On Wed, Feb 16, 2011 at 1:27 AM, Dan Magenheimer <dan.magenheimer@xxxxxxxxxx> wrote: >> -----Original Message----- >> From: Matt [mailto:jackdachef@xxxxxxxxx] >> Sent: Tuesday, February 15, 2011 5:12 PM >> To: Minchan Kim >> Cc: Dan Magenheimer; gregkh@xxxxxxx; Chris Mason; linux- >> kernel@xxxxxxxxxxxxxxx; linux-mm@xxxxxxxxx; ngupta@xxxxxxxxxx; linux- >> btrfs@xxxxxxxxxxxxxxx; Josef Bacik; Dan Rosenberg; Yan Zheng; >> miaox@xxxxxxxxxxxxxx; Li Zefan >> Subject: Re: [PATCH V2 0/3] drivers/staging: zcache: dynamic page >> cache/swap compression >> >> On Mon, Feb 14, 2011 at 4:35 AM, Minchan Kim <minchan.kim@xxxxxxxxx> >> wrote: >> > On Mon, Feb 14, 2011 at 10:29 AM, Matt <jackdachef@xxxxxxxxx> wrote: >> >> On Mon, Feb 14, 2011 at 1:24 AM, Matt <jackdachef@xxxxxxxxx> wrote: >> >>> On Mon, Feb 14, 2011 at 12:08 AM, Matt <jackdachef@xxxxxxxxx> >> wrote: >> >>>> On Wed, Feb 9, 2011 at 1:03 AM, Dan Magenheimer >> >>>> <dan.magenheimer@xxxxxxxxxx> wrote: >> >>>> [snip] >> >>>>> >> >>>>> If I've missed anything important, please let me know! >> >>>>> >> >>>>> Thanks again! >> >>>>> Dan >> >>>>> >> >>>> >> >>>> Hi Dan, >> >>>> >> >>>> thank you so much for answering my email in such detail ! >> >>>> >> >>>> I shall pick up on that mail in my next email sending to the >> mailing list :) >> >>>> >> >>>> >> >>>> currently I've got a problem with btrfs which seems to get >> triggered >> >>>> by cleancache get-operations: >> >>>> >> >>>> >> >>>> Feb 14 00:37:19 lupus kernel: [ 2831.297377] device fsid >> >>>> 354120c992a00761-5fa07d400126a895 devid 1 transid 7 >> >>>> /dev/mapper/portage >> >>>> Feb 14 00:37:19 lupus kernel: [ 2831.297698] btrfs: enabling disk >> space caching >> >>>> Feb 14 00:37:19 lupus kernel: [ 2831.297700] btrfs: force lzo >> compression >> >>>> Feb 14 00:37:19 lupus kernel: [ 2831.315844] zcache: created >> ephemeral >> >>>> tmem pool, id=3 >> >>>> Feb 14 00:39:20 lupus kernel: [ 2951.853188] BUG: unable to handle >> >>>> kernel paging request at 0000000001400050 >> >>>> Feb 14 00:39:20 lupus kernel: [ 2951.853219] IP: >> [<ffffffff8133ef1b>] >> >>>> btrfs_encode_fh+0x2b/0x120 >> >>>> Feb 14 00:39:20 lupus kernel: [ 2951.853242] PGD 0 >> >>>> Feb 14 00:39:20 lupus kernel: [ 2951.853251] Oops: 0000 [#1] >> PREEMPT SMP >> >>>> Feb 14 00:39:20 lupus kernel: [ 2951.853275] last sysfs file: >> >>>> /sys/devices/platform/coretemp.3/temp1_input >> >>>> Feb 14 00:39:20 lupus kernel: [ 2951.853295] CPU 4 >> >>>> Feb 14 00:39:20 lupus kernel: [ 2951.853303] Modules linked in: >> radeon >> >>>> ttm drm_kms_helper cfbcopyarea cfbimgblt cfbfillrect ipt_REJECT >> >>>> ipt_LOG xt_limit xt_tcpudp xt_state nf_nat_irc nf_conntrack_irc >> >>>> nf_nat_ftp nf_nat nf_conntrack_ipv4 nf_defrag_ipv4 >> nf_conntrack_ftp >> >>>> iptable_filter ipt_addrtype xt_DSCP xt_dscp xt_iprange ip_tables >> >>>> ip6table_filter xt_NFQUEUE xt_owner xt_hashlimit xt_conntrack >> xt_mark >> >>>> xt_multiport xt_connmark nf_conntrack xt_string ip6_tables >> x_tables >> >>>> it87 hwmon_vid coretemp snd_seq_dummy snd_seq_oss >> snd_seq_midi_event >> >>>> snd_seq snd_seq_device snd_pcm_oss snd_mixer_oss >> snd_hda_codec_hdmi >> >>>> snd_hda_codec_realtek snd_hda_intel snd_hda_codec snd_hwdep >> snd_pcm >> >>>> snd_timer snd soundcore i2c_i801 wmi e1000e shpchp snd_page_alloc >> >>>> libphy e1000 scsi_wait_scan sl811_hcd ohci_hcd ssb usb_storage >> >>>> ehci_hcd [last unloaded: tg3] >> >>>> Feb 14 00:39:20 lupus kernel: [ 2951.853682] >> >>>> Feb 14 00:39:20 lupus kernel: [ 2951.853690] Pid: 11394, comm: >> >>>> btrfs-transacti Not tainted 2.6.37-plus_v16_zcache #4 FMP55/ipower >> >>>> G3710 >> >>>> Feb 14 00:39:20 lupus kernel: [ 2951.853725] RIP: >> >>>> 0010:[<ffffffff8133ef1b>] [<ffffffff8133ef1b>] >> >>>> btrfs_encode_fh+0x2b/0x120 >> >>>> Feb 14 00:39:20 lupus kernel: [ 2951.853751] RSP: >> >>>> 0018:ffff880129a11b00 EFLAGS: 00010246 >> >>>> Feb 14 00:39:20 lupus kernel: [ 2951.853767] RAX: 00000000000000ff >> >>>> RBX: ffff88014a1ce628 RCX: 0000000000000000 >> >>>> Feb 14 00:39:20 lupus kernel: [ 2951.853788] RDX: ffff880129a11b3c >> >>>> RSI: ffff880129a11b70 RDI: 0000000000000006 >> >>>> Feb 14 00:39:20 lupus kernel: [ 2951.853808] RBP: 0000000001400000 >> >>>> R08: ffffffff8133eef0 R09: ffff880129a11c68 >> >>>> Feb 14 00:39:20 lupus kernel: [ 2951.853829] R10: 0000000000000001 >> >>>> R11: 0000000000000001 R12: ffff88014a1ce780 >> >>>> Feb 14 00:39:20 lupus kernel: [ 2951.853849] R13: ffff88021fefc000 >> >>>> R14: ffff88021fef9000 R15: 0000000000000000 >> >>>> Feb 14 00:39:20 lupus kernel: [ 2951.853870] FS: >> >>>> 0000000000000000(0000) GS:ffff8800bf500000(0000) >> >>>> knlGS:0000000000000000 >> >>>> Feb 14 00:39:20 lupus kernel: [ 2951.853894] CS: 0010 DS: 0000 >> ES: >> >>>> 0000 CR0: 000000008005003b >> >>>> Feb 14 00:39:20 lupus kernel: [ 2951.853911] CR2: 0000000001400050 >> >>>> CR3: 0000000001c27000 CR4: 00000000000006e0 >> >>>> Feb 14 00:39:20 lupus kernel: [ 2951.853932] DR0: 0000000000000000 >> >>>> DR1: 0000000000000000 DR2: 0000000000000000 >> >>>> Feb 14 00:39:20 lupus kernel: [ 2951.853952] DR3: 0000000000000000 >> >>>> DR6: 00000000ffff0ff0 DR7: 0000000000000400 >> >>>> Feb 14 00:39:20 lupus kernel: [ 2951.853973] Process btrfs- >> transacti >> >>>> (pid: 11394, threadinfo ffff880129a10000, task ffff880202e4ac40) >> >>>> Feb 14 00:39:20 lupus kernel: [ 2951.853999] Stack: >> >>>> Feb 14 00:39:20 lupus kernel: [ 2951.854006] ffff880129a11b50 >> >>>> ffff880000000003 ffff88003c60a098 0000000000000003 >> >>>> Feb 14 00:39:20 lupus kernel: [ 2951.854035] ffffffffffffffff >> >>>> ffffffff810e6aaa 0000000000000000 0000000602e4ac40 >> >>>> Feb 14 00:39:20 lupus kernel: [ 2951.854063] ffffffff8133e3f0 >> >>>> ffffffff810e6cee 0000000000001000 0000000000000000 >> >>>> Feb 14 00:39:20 lupus kernel: [ 2951.854092] Call Trace: >> >>>> Feb 14 00:39:20 lupus kernel: [ 2951.854103] [<ffffffff810e6aaa>] >> ? >> >>>> cleancache_get_key+0x4a/0x60 >> >>>> Feb 14 00:39:20 lupus kernel: [ 2951.854122] [<ffffffff8133e3f0>] >> ? >> >>>> btrfs_wake_function+0x0/0x20 >> >>>> Feb 14 00:39:20 lupus kernel: [ 2951.854140] [<ffffffff810e6cee>] >> ? >> >>>> __cleancache_flush_inode+0x3e/0x70 >> >>>> Feb 14 00:39:20 lupus kernel: [ 2951.854161] [<ffffffff810b34d2>] >> ? >> >>>> truncate_inode_pages_range+0x42/0x440 >> >>>> Feb 14 00:39:20 lupus kernel: [ 2951.854182] [<ffffffff812f115e>] >> ? >> >>>> btrfs_search_slot+0x89e/0xa00 >> >>>> Feb 14 00:39:20 lupus kernel: [ 2951.854201] [<ffffffff810c3a45>] >> ? >> >>>> unmap_mapping_range+0xc5/0x2a0 >> >>>> Feb 14 00:39:20 lupus kernel: [ 2951.854220] [<ffffffff810b3930>] >> ? >> >>>> truncate_pagecache+0x40/0x70 >> >>>> Feb 14 00:39:20 lupus kernel: [ 2951.854240] [<ffffffff813458b1>] >> ? >> >>>> btrfs_truncate_free_space_cache+0x81/0xe0 >> >>>> Feb 14 00:39:20 lupus kernel: [ 2951.854261] [<ffffffff812fce15>] >> ? >> >>>> btrfs_write_dirty_block_groups+0x245/0x500 >> >>>> Feb 14 00:39:20 lupus kernel: [ 2951.854283] [<ffffffff812fcb6a>] >> ? >> >>>> btrfs_run_delayed_refs+0x1ba/0x220 >> >>>> Feb 14 00:39:20 lupus kernel: [ 2951.854304] [<ffffffff8130afff>] >> ? >> >>>> commit_cowonly_roots+0xff/0x1d0 >> >>>> Feb 14 00:39:20 lupus kernel: [ 2951.854323] [<ffffffff8130c583>] >> ? >> >>>> btrfs_commit_transaction+0x363/0x760 >> >>>> Feb 14 00:39:20 lupus kernel: [ 2951.854344] [<ffffffff81067ea0>] >> ? >> >>>> autoremove_wake_function+0x0/0x30 >> >>>> Feb 14 00:39:20 lupus kernel: [ 2951.854364] [<ffffffff81305bc3>] >> ? >> >>>> transaction_kthread+0x283/0x2a0 >> >>>> Feb 14 00:39:20 lupus kernel: [ 2951.854383] [<ffffffff81305940>] >> ? >> >>>> transaction_kthread+0x0/0x2a0 >> >>>> Feb 14 00:39:20 lupus kernel: [ 2951.854401] [<ffffffff81305940>] >> ? >> >>>> transaction_kthread+0x0/0x2a0 >> >>>> Feb 14 00:39:20 lupus kernel: [ 2951.854420] [<ffffffff81067a16>] >> ? >> >>>> kthread+0x96/0xa0 >> >>>> Feb 14 00:39:20 lupus kernel: [ 2951.854437] [<ffffffff81003514>] >> ? >> >>>> kernel_thread_helper+0x4/0x10 >> >>>> Feb 14 00:39:20 lupus kernel: [ 2951.854455] [<ffffffff81067980>] >> ? >> >>>> kthread+0x0/0xa0 >> >>>> Feb 14 00:39:20 lupus kernel: [ 2951.854471] [<ffffffff81003510>] >> ? >> >>>> kernel_thread_helper+0x0/0x10 >> >>>> Feb 14 00:39:20 lupus kernel: [ 2951.854488] Code: 55 b8 ff 00 00 >> 00 >> >>>> 53 48 89 fb 48 83 ec 18 48 8b 6f 10 8b 3a 83 ff 04 0f 86 d5 00 00 >> 00 >> >>>> 85 c9 0f 95 c1 83 ff 07 0f 86 d5 00 00 00 <48> 8b 45 50 bf 05 00 >> 00 00 >> >>>> 48 89 06 84 c9 48 8b 85 68 fe ff ff >> >>>> Feb 14 00:39:20 lupus kernel: [ 2951.854742] RIP >> [<ffffffff8133ef1b>] >> >>>> btrfs_encode_fh+0x2b/0x120 >> >>>> Feb 14 00:39:20 lupus kernel: [ 2951.854762] RSP >> <ffff880129a11b00> >> >>>> Feb 14 00:39:20 lupus kernel: [ 2951.854773] CR2: 0000000001400050 >> >>>> Feb 14 00:39:20 lupus kernel: [ 2951.860906] ---[ end trace >> >>>> f831c5ceeaa49287 ]--- >> >>>> >> >>>> in my case I had compress-force with lzo and disk_cache enabled >> >>>> >> >>>> >> >>>> another user of the kernel I'm currently running has had the same >> >>>> problem with zcache >> >>>> (http://forums.gentoo.org/viewtopic-p-6571799.html#6571799) >> >>>> >> >>>> (looks like in his case compression and any other fancy additional >> >>>> features weren't enabled) >> >>>> >> >>>> >> >>>> changes made by this kernel or patchset to btrfs are from >> >>>> * io-less dirty throttling patchset (44 patches) >> >>>> * zcache V2 ("[PATCH] staging: zcache: fix memory leak" should be >> >>>> applied in both cases) >> >>>> * PATCH] fix (latent?) memory corruption in btrfs_encode_fh() >> >>>> * btrfs-unstable changes to state of >> >>>> 3a90983dbdcb2f4f48c0d771d8e5b4d88f27fae6 (so practically equals >> btrfs >> >>>> from 2.6.38-rc4+) >> >>>> >> >>>> I haven't tried downgrading to vanilla 2.6.37 with zcache only, >> yet, >> >>>> >> >>>> but kind of upgraded btrfs to the latest state of the btrfs- >> unstable >> >>>> repository >> (http://git.eu.kernel.org/?p=linux/kernel/git/mason/btrfs- >> unstable.git;a=summary) >> >>>> namely 3a90983dbdcb2f4f48c0d771d8e5b4d88f27fae6 >> >>>> >> >>>> this also didn't help and seemed to produce the same error-message >> >>>> >> >>>> so to summarize: >> >>>> >> >>>> 1) error message appearing with all 4 patchsets applied changing >> >>>> btrfs-code and compress-force=lzo and disk_cache enabled >> >>>> >> >>>> 2) error message appearing with default mount-options and btrfs >> from >> >>>> 2.6.37 and changes for zcache & io-less dirty throttling patchset >> >>>> applied (first 2 patch(sets)) from list) >> >>>> >> >>>> >> >>>> in my case I tried to extract / play back a 1.7 GiB tarball of my >> >>>> portage-directory (lots of small files and some tar.bzip2 >> archives) >> >>>> via pbzip2 or 7z when the error happened and the message was shown >> >>>> >> >>>> Due to KMS sound (webradio streaming) was still running but I >> couldn't >> >>>> continue work (X switching to kernel output) so I did the magic >> sysrq >> >>>> combo (reisub) >> >>>> >> >>>> >> >>>> Does that BUG message ring a bell for anyone ? >> >>>> >> >>>> (if I should leave out anyone from the CC in the next emails or >> >>>> future, please holler - I don't want to spam your inboxes) >> >>>> >> >>>> Thanks >> >>>> >> >>>> Matt >> >>>> >> >>> >> >>> >> >>> OK, >> >>> >> >>> here's the output of a kernel - >> >>> >> >>> staying as close to vanilla (2.6.37) as the current situation >> allows >> >>> (only including some corruption or leak fixes for zram & zcache and >> >>> "zram_xvmalloc: 64K page fixes and optimizations" (and 2 reiserfs >> >>> fixes)): >> >>> >> >>> so in total the following patches are included in this new kernel >> >>> (2.6.37-zcache): >> >>> >> >>> zram changes: >> >>> 1 zram: Fix sparse warning 'Using plain integer as NULL pointer' >> >>> 2 [PATCH] zram: fix data corruption issue >> >>> 3 [PATCH 0/7][v2] zram_xvmalloc: 64K page fixes and optimizations >> >>> >> >>> zcache: >> >>> 1 zcache-linux-2.6.37-110205 >> >>> 2 [PATCH] staging: zcache: fix memory leak >> >>> 3 [PATCH] zcache: Fix build error when sysfs is not defined >> >>> >> >>> reiserfs: >> >>> 1 [PATCH] reiserfs: Make sure va_end() is always called after >> >>> 2 [patch] reiserfs: potential ERR_PTR dereference >> >>> >> >>> >> >>> the same procedure: >> >>> >> >>> trying to extract the mentioned portage-tarball: >> >>> >> >>> time (7z e -so -tbzip2 -mmt=5 /system/portage_backup_022011.tbz2 | >> tar >> >>> -xp -C /usr/gentoo/) >> >>> >> >>> >> >>> this hopefully should make it easier to track down the problem: >> >>> >> >>> >> >>> Feb 14 01:59:59 lupus kernel: [ 364.777143] device fsid >> >>> 684a4213565dd3fe-ca991821badc2aac devid 1 transid 7 >> >>> /dev/mapper/portage >> >>> Feb 14 01:59:59 lupus kernel: [ 364.844994] zcache: created >> ephemeral >> >>> tmem pool, id=2 >> >>> Feb 14 02:02:49 lupus kernel: [ 534.577573] BUG: unable to handle >> >>> kernel paging request at 0000000037610050 >> >>> Feb 14 02:02:49 lupus kernel: [ 534.577605] IP: >> [<ffffffff81338cbb>] >> >>> btrfs_encode_fh+0x2b/0x110 >> >>> Feb 14 02:02:49 lupus kernel: [ 534.577630] PGD 0 >> >>> Feb 14 02:02:49 lupus kernel: [ 534.577640] Oops: 0000 [#1] >> PREEMPT SMP >> >>> Feb 14 02:02:49 lupus kernel: [ 534.577665] last sysfs file: >> >>> /sys/devices/system/cpu/cpu7/cache/index2/shared_cpu_map >> >>> Feb 14 02:02:49 lupus kernel: [ 534.577693] CPU 5 >> >>> Feb 14 02:02:49 lupus kernel: [ 534.577701] Modules linked in: >> radeon >> >>> ttm drm_kms_helper cfbcopyarea cfbimgblt cfbfillrect ipt_REJECT >> >>> ipt_LOG xt_limit xt_tcpudp xt_state nf_nat_irc nf_conntrack_irc >> >>> nf_nat_ftp nf_nat nf_conntrack_ipv4 nf_defrag_ipv4 nf_conntrack_ftp >> >>> iptable_filter ipt_addrtype xt_DSCP xt_dscp xt_iprange ip_tables >> >>> ip6table_filter xt_NFQUEUE xt_owner xt_hashlimit xt_conntrack >> xt_mark >> >>> xt_multiport xt_connmark nf_conntrack xt_string ip6_tables x_tables >> >>> it87 hwmon_vid coretemp snd_seq_dummy snd_seq_oss >> snd_seq_midi_event >> >>> snd_seq snd_seq_device snd_pcm_oss snd_mixer_oss snd_hda_codec_hdmi >> >>> snd_hda_codec_realtek snd_hda_intel snd_hda_codec snd_hwdep snd_pcm >> >>> snd_timer snd e1000e soundcore i2c_i801 shpchp snd_page_alloc wmi >> >>> libphy e1000 scsi_wait_scan sl811_hcd ohci_hcd ssb usb_storage >> >>> ehci_hcd [last unloaded: tg3] >> >>> Feb 14 02:02:49 lupus kernel: [ 534.578114] >> >>> Feb 14 02:02:49 lupus kernel: [ 534.578124] Pid: 8285, comm: tar >> Not >> >>> tainted 2.6.37-zcache #2 FMP55/ipower G3710 >> >>> Feb 14 02:02:49 lupus kernel: [ 534.578146] RIP: >> >>> 0010:[<ffffffff81338cbb>] [<ffffffff81338cbb>] >> >>> btrfs_encode_fh+0x2b/0x110 >> >>> Feb 14 02:02:49 lupus kernel: [ 534.578172] RSP: >> >>> 0018:ffff88023ea9dcc8 EFLAGS: 00010246 >> >>> Feb 14 02:02:49 lupus kernel: [ 534.578189] RAX: 00000000000000ff >> >>> RBX: ffff8800b8643228 RCX: 0000000000000000 >> >>> Feb 14 02:02:49 lupus kernel: [ 534.578210] RDX: ffff88023ea9dd04 >> >>> RSI: ffff88023ea9dd38 RDI: 0000000000000006 >> >>> Feb 14 02:02:49 lupus kernel: [ 534.578230] RBP: 0000000037610000 >> >>> R08: ffffffff81338c90 R09: 0000000000000000 >> >>> Feb 14 02:02:49 lupus kernel: [ 534.578251] R10: 0000000000000019 >> >>> R11: 0000000000000001 R12: ffff8800b8643380 >> >>> Feb 14 02:02:49 lupus kernel: [ 534.578272] R13: ffff8800b8643258 >> >>> R14: 00007fff806f1f00 R15: 0000000000000000 >> >>> Feb 14 02:02:49 lupus kernel: [ 534.578293] FS: >> >>> 00007f823d7ed700(0000) GS:ffff8800bf540000(0000) >> >>> knlGS:0000000000000000 >> >>> Feb 14 02:02:49 lupus kernel: [ 534.578317] CS: 0010 DS: 0000 ES: >> >>> 0000 CR0: 0000000080050033 >> >>> Feb 14 02:02:49 lupus kernel: [ 534.578334] CR2: 0000000037610050 >> >>> CR3: 000000023dcef000 CR4: 00000000000006e0 >> >>> Feb 14 02:02:49 lupus kernel: [ 534.578356] DR0: 0000000000000000 >> >>> DR1: 0000000000000000 DR2: 0000000000000000 >> >>> Feb 14 02:02:49 lupus kernel: [ 534.578377] DR3: 0000000000000000 >> >>> DR6: 00000000ffff0ff0 DR7: 0000000000000400 >> >>> Feb 14 02:02:49 lupus kernel: [ 534.578398] Process tar (pid: >> 8285, >> >>> threadinfo ffff88023ea9c000, task ffff88023e8b9d40) >> >>> Feb 14 02:02:49 lupus kernel: [ 534.578421] Stack: >> >>> Feb 14 02:02:49 lupus kernel: [ 534.578428] 000000013d096000 >> >>> ffff88023ed84800 ffff88023ea9c000 0000000000000002 >> >>> Feb 14 02:02:49 lupus kernel: [ 534.578458] ffffffffffffffff >> >>> ffffffff810e3b1a 0000000000000001 000000061e1d5240 >> >>> Feb 14 02:02:49 lupus kernel: [ 534.578486] fffffffffffffffb >> >>> ffffffff810e3d5e ffff88010f383000 0000001ab86cb908 >> >>> Feb 14 02:02:49 lupus kernel: [ 534.578514] Call Trace: >> >>> Feb 14 02:02:49 lupus kernel: [ 534.578525] [<ffffffff810e3b1a>] >> ? >> >>> cleancache_get_key+0x4a/0x60 >> >>> Feb 14 02:02:49 lupus kernel: [ 534.578544] [<ffffffff810e3d5e>] >> ? >> >>> __cleancache_flush_inode+0x3e/0x70 >> >>> Feb 14 02:02:49 lupus kernel: [ 534.578565] [<ffffffff810b0ed2>] >> ? >> >>> truncate_inode_pages_range+0x42/0x440 >> >>> Feb 14 02:02:49 lupus kernel: [ 534.578586] [<ffffffff81338451>] >> ? >> >>> btrfs_tree_unlock+0x41/0x50 >> >>> Feb 14 02:02:49 lupus kernel: [ 534.578605] [<ffffffff812e4ed5>] >> ? >> >>> btrfs_release_path+0x15/0x70 >> >>> Feb 14 02:02:49 lupus kernel: [ 534.578624] [<ffffffff8130bf29>] >> ? >> >>> btrfs_run_delayed_iputs+0x49/0x120 >> >>> Feb 14 02:02:49 lupus kernel: [ 534.578644] [<ffffffff813107e7>] >> ? >> >>> btrfs_evict_inode+0x27/0x1e0 >> >>> Feb 14 02:02:49 lupus kernel: [ 534.578663] [<ffffffff810fc3aa>] >> ? >> >>> evict+0x1a/0xa0 >> >>> Feb 14 02:02:49 lupus kernel: [ 534.578678] [<ffffffff810fc6bd>] >> ? >> >>> iput+0x1cd/0x2b0 >> >>> Feb 14 02:02:49 lupus kernel: [ 534.578694] [<ffffffff810f266f>] >> ? >> >>> do_unlinkat+0x12f/0x1d0 >> >>> Feb 14 02:02:49 lupus kernel: [ 534.578712] [<ffffffff810027bb>] >> ? >> >>> system_call_fastpath+0x16/0x1b >> >>> Feb 14 02:02:49 lupus kernel: [ 534.578730] Code: 55 b8 ff 00 00 >> 00 >> >>> 53 48 89 fb 48 83 ec 18 48 8b 6f 10 8b 3a 83 ff 04 0f 86 d5 00 00 >> 00 >> >>> 85 c9 0f 95 c1 83 ff 07 0f 86 d5 00 00 00 <48> 8b 45 50 bf 05 00 00 >> 00 >> >>> 48 89 06 84 c9 48 8b 85 68 fe ff ff >> >>> Feb 14 02:02:49 lupus kernel: [ 534.578986] RIP >> [<ffffffff81338cbb>] >> >>> btrfs_encode_fh+0x2b/0x110 >> >>> Feb 14 02:02:49 lupus kernel: [ 534.579081] RSP >> <ffff88023ea9dcc8> >> >>> Feb 14 02:02:49 lupus kernel: [ 534.579093] CR2: 0000000037610050 >> >>> Feb 14 02:02:49 lupus kernel: [ 534.587513] ---[ end trace >> >>> c596b12e66c0b360 ]--- >> >>> >> >>> >> >>> for reference I've pasted it to pastebin.com: >> >>> >> >>> "2.6.37_zcache_V2.patch" >> >>> http://pastebin.com/cVSkwQ6M >> >>> >> >>> >> >>> >> >>> >> >>> >> >>> after the reboot I had forgotten to not mount the btrfs volume and >> it >> >>> threw a similar error-message again and remounted several >> partitions >> >>> read-only (including the system partition) >> >>> the partition with btrfs (/usr/gentoo) couldn't be unmounted since >> the >> >>> umount process kind of hang >> >>> >> >>> so here's the error message after a reboot (might not be accurate >> or >> >>> kind of "skewed" since other patches are included (io-less dirty >> >>> throttling, PATCH] fix (latent?) memory corruption in >> >>> btrfs_encode_fh() and latest changes for btrfs)) but might help to >> get >> >>> some more evidence: >> >>> >> >>> >> >>> Feb 14 02:05:46 lupus kernel: [ 63.922648] device fsid >> >>> 684a4213565dd3fe-ca991821badc2aac devid 1 transid 13 >> >>> /dev/mapper/portage >> >>> Feb 14 02:05:46 lupus kernel: [ 64.047118] btrfs: unlinked 1 >> orphans >> >>> Feb 14 02:05:46 lupus kernel: [ 64.051956] zcache: created >> ephemeral >> >>> tmem pool, id=3 >> >>> Feb 14 02:05:48 lupus kernel: [ 65.801364] hub 2-1:1.0: >> hub_suspend >> >>> Feb 14 02:05:48 lupus kernel: [ 65.801376] usb 2-1: unlink >> >>> qh256-0001/ffff88023fefd180 start 1 [1/0 us] >> >>> Feb 14 02:05:48 lupus kernel: [ 65.801559] usb 2-1: usb auto- >> suspend >> >>> Feb 14 02:05:50 lupus kernel: [ 67.797929] hub 2-0:1.0: >> hub_suspend >> >>> Feb 14 02:05:50 lupus kernel: [ 67.797939] usb usb2: bus auto- >> suspend >> >>> Feb 14 02:05:50 lupus kernel: [ 67.797942] ehci_hcd 0000:00:1d.0: >> >>> suspend root hub >> >>> Feb 14 02:05:52 lupus kernel: [ 70.050493] BUG: unable to handle >> >>> kernel paging request at 0000030341ed0050 >> >>> Feb 14 02:05:52 lupus kernel: [ 70.050670] IP: >> [<ffffffff8133ef1b>] >> >>> btrfs_encode_fh+0x2b/0x120 >> >>> Feb 14 02:05:52 lupus kernel: [ 70.050807] PGD 0 >> >>> Feb 14 02:05:52 lupus kernel: [ 70.050929] Oops: 0000 [#1] >> PREEMPT SMP >> >>> Feb 14 02:05:52 lupus kernel: [ 70.051223] last sysfs file: >> >>> /sys/module/pcie_aspm/parameters/policy >> >>> Feb 14 02:05:52 lupus kernel: [ 70.051365] CPU 6 >> >>> Feb 14 02:05:52 lupus kernel: [ 70.051411] Modules linked in: >> >>> ipt_REJECT ipt_LOG xt_limit xt_tcpudp xt_state nf_nat_irc >> >>> nf_conntrack_irc nf_nat_ftp nf_nat nf_conntrack_ipv4 nf_defrag_ipv4 >> >>> nf_conntrack_ftp iptable_filter ipt_addrtype xt_DSCP xt_dscp >> >>> xt_iprange ip_tables ip6table_filter xt_NFQUEUE xt_owner >> xt_hashlimit >> >>> xt_conntrack xt_mark xt_multiport xt_connmark nf_conntrack >> xt_string >> >>> ip6_tables x_tables it87 hwmon_vid coretemp snd_seq_dummy >> snd_seq_oss >> >>> snd_seq_midi_event snd_seq snd_seq_device snd_pcm_oss snd_mixer_oss >> >>> snd_hda_codec_hdmi snd_hda_codec_realtek snd_hda_intel >> snd_hda_codec >> >>> snd_hwdep snd_pcm snd_timer snd i2c_i801 soundcore wmi shpchp >> e1000e >> >>> snd_page_alloc libphy e1000 scsi_wait_scan sl811_hcd ohci_hcd ssb >> >>> usb_storage ehci_hcd [last unloaded: tg3] >> >>> Feb 14 02:05:52 lupus kernel: [ 70.054694] >> >>> Feb 14 02:05:52 lupus kernel: [ 70.054776] Pid: 7962, comm: >> umount >> >>> Not tainted 2.6.37-plus_v16_zcache #4 FMP55/ipower G3710 >> >>> Feb 14 02:05:52 lupus kernel: [ 70.054912] RIP: >> >>> 0010:[<ffffffff8133ef1b>] [<ffffffff8133ef1b>] >> >>> btrfs_encode_fh+0x2b/0x120 >> >>> Feb 14 02:05:52 lupus kernel: [ 70.055084] RSP: >> >>> 0018:ffff88023c77d6f8 EFLAGS: 00010246 >> >>> Feb 14 02:05:52 lupus kernel: [ 70.055173] RAX: 00000000000000ff >> >>> RBX: ffff88023cde0168 RCX: 0000000000000000 >> >>> Feb 14 02:05:52 lupus kernel: [ 70.055265] RDX: ffff88023c77d734 >> >>> RSI: ffff88023c77d768 RDI: 0000000000000006 >> >>> Feb 14 02:05:52 lupus kernel: [ 70.055357] RBP: 0000030341ed0000 >> >>> R08: ffffffff8133eef0 R09: ffff88023c77d8d8 >> >>> Feb 14 02:05:52 lupus kernel: [ 70.055448] R10: 0000000000000003 >> >>> R11: 0000000000000001 R12: 00000000ffffffff >> >>> Feb 14 02:05:52 lupus kernel: [ 70.055540] R13: ffff88023cde0030 >> >>> R14: ffffea0007dd39f0 R15: 0000000000000001 >> >>> Feb 14 02:05:52 lupus kernel: [ 70.055633] FS: >> >>> 00007fb1cad04760(0000) GS:ffff8800bf580000(0000) >> >>> knlGS:0000000000000000 >> >>> Feb 14 02:05:52 lupus kernel: [ 70.055762] CS: 0010 DS: 0000 ES: >> >>> 0000 CR0: 000000008005003b >> >>> Feb 14 02:05:52 lupus kernel: [ 70.055851] CR2: 0000030341ed0050 >> >>> CR3: 000000023c7d5000 CR4: 00000000000006e0 >> >>> Feb 14 02:05:52 lupus kernel: [ 70.055943] DR0: 0000000000000000 >> >>> DR1: 0000000000000000 DR2: 0000000000000000 >> >>> Feb 14 02:05:52 lupus kernel: [ 70.056035] DR3: 0000000000000000 >> >>> DR6: 00000000ffff0ff0 DR7: 0000000000000400 >> >>> Feb 14 02:05:52 lupus kernel: [ 70.056128] Process umount (pid: >> >>> 7962, threadinfo ffff88023c77c000, task ffff88023c7a4260) >> >>> Feb 14 02:05:52 lupus kernel: [ 70.056257] Stack: >> >>> Feb 14 02:05:52 lupus kernel: [ 70.056338] 0000000000000000 >> >>> 0000000000000002 ffff880200000000 0000000000000003 >> >>> Feb 14 02:05:52 lupus kernel: [ 70.056630] ffffea0007dd39f0 >> >>> ffffffff810e6aaa ffff880200000041 0000000600000246 >> >>> Feb 14 02:05:52 lupus kernel: [ 70.056922] ffff88023cdcd300 >> >>> ffffffff810e6b3a 0000000000000001 ffffffff8132bb7c >> >>> Feb 14 02:05:52 lupus kernel: [ 70.057213] Call Trace: >> >>> Feb 14 02:05:52 lupus kernel: [ 70.057301] [<ffffffff810e6aaa>] >> ? >> >>> cleancache_get_key+0x4a/0x60 >> >>> Feb 14 02:05:52 lupus kernel: [ 70.057393] [<ffffffff810e6b3a>] >> ? >> >>> __cleancache_get_page+0x7a/0xd0 >> >>> Feb 14 02:05:52 lupus kernel: [ 70.057487] [<ffffffff8132bb7c>] >> ? >> >>> merge_state+0x7c/0x150 >> >>> Feb 14 02:05:52 lupus kernel: [ 70.057579] [<ffffffff8132e4de>] >> ? >> >>> __extent_read_full_page+0x52e/0x710 >> >>> Feb 14 02:05:52 lupus kernel: [ 70.057673] [<ffffffff813bdea4>] >> ? >> >>> rb_insert_color+0xa4/0x140 >> >>> Feb 14 02:05:52 lupus kernel: [ 70.057766] [<ffffffff8134b0b6>] >> ? >> >>> tree_insert+0x86/0x1e0 >> >>> Feb 14 02:05:52 lupus kernel: [ 70.057859] [<ffffffff81058c73>] >> ? >> >>> lock_timer_base.clone.22+0x33/0x70 >> >>> Feb 14 02:05:52 lupus kernel: [ 70.058004] [<ffffffff81305060>] >> ? >> >>> btree_get_extent+0x0/0x1c0 >> >>> Feb 14 02:05:52 lupus kernel: [ 70.058097] [<ffffffff81330b21>] >> ? >> >>> read_extent_buffer_pages+0x2d1/0x470 >> >>> Feb 14 02:05:52 lupus kernel: [ 70.058191] [<ffffffff81305060>] >> ? >> >>> btree_get_extent+0x0/0x1c0 >> >>> Feb 14 02:05:52 lupus kernel: [ 70.058283] [<ffffffff8130674d>] >> ? >> >>> btree_read_extent_buffer_pages.clone.65+0x4d/0xa0 >> >>> Feb 14 02:05:52 lupus kernel: [ 70.058415] [<ffffffff813076f9>] >> ? >> >>> read_tree_block+0x39/0x60 >> >>> Feb 14 02:05:52 lupus kernel: [ 70.058508] [<ffffffff812ed5e6>] >> ? >> >>> read_block_for_search.clone.40+0x116/0x410 >> >>> Feb 14 02:05:52 lupus kernel: [ 70.058638] [<ffffffff812eb228>] >> ? >> >>> btrfs_cow_block+0x118/0x2b0 >> >>> Feb 14 02:05:52 lupus kernel: [ 70.058731] [<ffffffff812f0bc7>] >> ? >> >>> btrfs_search_slot+0x307/0xa00 >> >>> Feb 14 02:05:52 lupus kernel: [ 70.058823] [<ffffffff812f6b18>] >> ? >> >>> lookup_inline_extent_backref+0x98/0x4a0 >> >>> Feb 14 02:05:52 lupus kernel: [ 70.058919] [<ffffffff810e33d7>] >> ? >> >>> kmem_cache_alloc+0x87/0xa0 >> >>> Feb 14 02:05:52 lupus kernel: [ 70.059032] [<ffffffff812f891c>] >> ? >> >>> __btrfs_free_extent+0xcc/0x6f0 >> >>> Feb 14 02:05:52 lupus kernel: [ 70.059125] [<ffffffff812fc4cf>] >> ? >> >>> run_clustered_refs+0x39f/0x880 >> >>> Feb 14 02:05:52 lupus kernel: [ 70.059220] [<ffffffff810b1f98>] >> ? >> >>> pagevec_lookup_tag+0x18/0x20 >> >>> Feb 14 02:05:52 lupus kernel: [ 70.059312] [<ffffffff810a7c81>] >> ? >> >>> filemap_fdatawait_range+0x91/0x180 >> >>> Feb 14 02:05:52 lupus kernel: [ 70.059405] [<ffffffff812fca77>] >> ? >> >>> btrfs_run_delayed_refs+0xc7/0x220 >> >>> Feb 14 02:05:52 lupus kernel: [ 70.059498] [<ffffffff8130c29c>] >> ? >> >>> btrfs_commit_transaction+0x7c/0x760 >> >>> Feb 14 02:05:52 lupus kernel: [ 70.059591] [<ffffffff81067ea0>] >> ? >> >>> autoremove_wake_function+0x0/0x30 >> >>> Feb 14 02:05:52 lupus kernel: [ 70.059683] [<ffffffff8130cdef>] >> ? >> >>> start_transaction+0x1bf/0x270 >> >>> Feb 14 02:05:52 lupus kernel: [ 70.059775] [<ffffffff8110e96a>] >> ? >> >>> __sync_filesystem+0x5a/0x90 >> >>> Feb 14 02:05:52 lupus kernel: [ 70.059867] [<ffffffff810eae8d>] >> ? >> >>> generic_shutdown_super+0x2d/0x100 >> >>> Feb 14 02:05:52 lupus kernel: [ 70.059960] [<ffffffff810eafb9>] >> ? >> >>> kill_anon_super+0x9/0x50 >> >>> Feb 14 02:05:52 lupus kernel: [ 70.060051] [<ffffffff810eb266>] >> ? >> >>> deactivate_locked_super+0x26/0x80 >> >>> Feb 14 02:05:52 lupus kernel: [ 70.060144] [<ffffffff811043ea>] >> ? >> >>> sys_umount+0x7a/0x390 >> >>> Feb 14 02:05:52 lupus kernel: [ 70.060235] [<ffffffff810027bb>] >> ? >> >>> system_call_fastpath+0x16/0x1b >> >>> Feb 14 02:05:52 lupus kernel: [ 70.060325] Code: 55 b8 ff 00 00 >> 00 >> >>> 53 48 89 fb 48 83 ec 18 48 8b 6f 10 8b 3a 83 ff 04 0f 86 d5 00 00 >> 00 >> >>> 85 c9 0f 95 c1 83 ff 07 0f 86 d5 00 00 00 <48> 8b 45 50 bf 05 00 00 >> 00 >> >>> 48 89 06 84 c9 48 8b 85 68 fe ff ff >> >>> Feb 14 02:05:52 lupus kernel: [ 70.063170] RIP >> [<ffffffff8133ef1b>] >> >>> btrfs_encode_fh+0x2b/0x120 >> >>> Feb 14 02:05:52 lupus kernel: [ 70.063302] RSP >> <ffff88023c77d6f8> >> >>> Feb 14 02:05:52 lupus kernel: [ 70.063386] CR2: 0000030341ed0050 >> >>> Feb 14 02:05:52 lupus kernel: [ 70.063528] ---[ end trace >> >>> 3313552d105b1535 ]--- >> >>> Feb 14 02:06:16 lupus kernel: [ 93.961960] BUG: unable to handle >> >>> kernel paging request at 0000030341ed0050 >> >>> Feb 14 02:06:16 lupus kernel: [ 93.962171] IP: >> [<ffffffff8133ef1b>] >> >>> btrfs_encode_fh+0x2b/0x120 >> >>> Feb 14 02:06:16 lupus kernel: [ 93.962307] PGD 0 >> >>> Feb 14 02:06:16 lupus kernel: [ 93.962430] Oops: 0000 [#2] >> PREEMPT SMP >> >>> Feb 14 02:06:16 lupus kernel: [ 93.962637] last sysfs file: >> >>> /sys/devices/system/cpu/cpu7/cache/index2/shared_cpu_map >> >>> Feb 14 02:06:16 lupus kernel: [ 93.962766] CPU 5 >> >>> Feb 14 02:06:16 lupus kernel: [ 93.962812] Modules linked in: >> >>> ipt_REJECT ipt_LOG xt_limit xt_tcpudp xt_state nf_nat_irc >> >>> nf_conntrack_irc nf_nat_ftp nf_nat nf_conntrack_ipv4 nf_defrag_ipv4 >> >>> nf_conntrack_ftp iptable_filter ipt_addrtype xt_DSCP xt_dscp >> >>> xt_iprange ip_tables ip6table_filter xt_NFQUEUE xt_owner >> xt_hashlimit >> >>> xt_conntrack xt_mark xt_multiport xt_connmark nf_conntrack >> xt_string >> >>> ip6_tables x_tables it87 hwmon_vid coretemp snd_seq_dummy >> snd_seq_oss >> >>> snd_seq_midi_event snd_seq snd_seq_device snd_pcm_oss snd_mixer_oss >> >>> snd_hda_codec_hdmi snd_hda_codec_realtek snd_hda_intel >> snd_hda_codec >> >>> snd_hwdep snd_pcm snd_timer snd i2c_i801 soundcore wmi shpchp >> e1000e >> >>> snd_page_alloc libphy e1000 scsi_wait_scan sl811_hcd ohci_hcd ssb >> >>> usb_storage ehci_hcd [last unloaded: tg3] >> >>> Feb 14 02:06:16 lupus kernel: [ 93.966044] >> >>> Feb 14 02:06:16 lupus kernel: [ 93.966127] Pid: 7915, comm: >> >>> btrfs-transacti Tainted: G D 2.6.37-plus_v16_zcache #4 >> >>> FMP55/ipower G3710 >> >>> Feb 14 02:06:16 lupus kernel: [ 93.966266] RIP: >> >>> 0010:[<ffffffff8133ef1b>] [<ffffffff8133ef1b>] >> >>> btrfs_encode_fh+0x2b/0x120 >> >>> Feb 14 02:06:16 lupus kernel: [ 93.966440] RSP: >> >>> 0018:ffff88023c63b6e0 EFLAGS: 00010246 >> >>> Feb 14 02:06:16 lupus kernel: [ 93.966528] RAX: 00000000000000ff >> >>> RBX: ffff88023cde0168 RCX: 0000000000000000 >> >>> Feb 14 02:06:16 lupus kernel: [ 93.966620] RDX: ffff88023c63b71c >> >>> RSI: ffff88023c63b750 RDI: 0000000000000006 >> >>> Feb 14 02:06:16 lupus kernel: [ 93.966713] RBP: 0000030341ed0000 >> >>> R08: ffffffff8133eef0 R09: ffff88023c63b8c0 >> >>> Feb 14 02:06:16 lupus kernel: [ 93.966805] R10: 0000000000000003 >> >>> R11: 0000000000000001 R12: 00000000ffffffff >> >>> Feb 14 02:06:16 lupus kernel: [ 93.966897] R13: ffff88023cde0030 >> >>> R14: ffffea0007d59bc8 R15: 0000000000000001 >> >>> Feb 14 02:06:16 lupus kernel: [ 93.966990] FS: >> >>> 0000000000000000(0000) GS:ffff8800bf540000(0000) >> >>> knlGS:0000000000000000 >> >>> Feb 14 02:06:16 lupus kernel: [ 93.967120] CS: 0010 DS: 0000 ES: >> >>> 0000 CR0: 000000008005003b >> >>> Feb 14 02:06:16 lupus kernel: [ 93.967209] CR2: 0000030341ed0050 >> >>> CR3: 0000000001c27000 CR4: 00000000000006e0 >> >>> Feb 14 02:06:16 lupus kernel: [ 93.967302] DR0: 0000000000000000 >> >>> DR1: 0000000000000000 DR2: 0000000000000000 >> >>> Feb 14 02:06:16 lupus kernel: [ 93.967394] DR3: 0000000000000000 >> >>> DR6: 00000000ffff0ff0 DR7: 0000000000000400 >> >>> Feb 14 02:06:16 lupus kernel: [ 93.967500] Process btrfs- >> transacti >> >>> (pid: 7915, threadinfo ffff88023c63a000, task ffff88023c7a1620) >> >>> Feb 14 02:06:16 lupus kernel: [ 93.967630] Stack: >> >>> Feb 14 02:06:16 lupus kernel: [ 93.967711] 0000000000000000 >> >>> 0000000000000002 0000000000000000 0000000000000003 >> >>> Feb 14 02:06:16 lupus kernel: [ 93.968057] ffffea0007d59bc8 >> >>> ffffffff810e6aaa 0000000000000041 0000000600000002 >> >>> Feb 14 02:06:16 lupus kernel: [ 93.968348] 0000000000000000 >> >>> ffffffff810e6b3a 0000000000000001 ffffffff00000001 >> >>> Feb 14 02:06:16 lupus kernel: [ 93.968639] Call Trace: >> >>> Feb 14 02:06:16 lupus kernel: [ 93.968728] [<ffffffff810e6aaa>] >> ? >> >>> cleancache_get_key+0x4a/0x60 >> >>> Feb 14 02:06:16 lupus kernel: [ 93.968820] [<ffffffff810e6b3a>] >> ? >> >>> __cleancache_get_page+0x7a/0xd0 >> >>> Feb 14 02:06:16 lupus kernel: [ 93.968914] [<ffffffff8132e4de>] >> ? >> >>> __extent_read_full_page+0x52e/0x710 >> >>> Feb 14 02:06:16 lupus kernel: [ 93.969008] [<ffffffff812f3f93>] >> ? >> >>> update_reserved_bytes+0xb3/0x140 >> >>> Feb 14 02:06:16 lupus kernel: [ 93.969102] [<ffffffff81305060>] >> ? >> >>> btree_get_extent+0x0/0x1c0 >> >>> Feb 14 02:06:16 lupus kernel: [ 93.969193] [<ffffffff8132bb7c>] >> ? >> >>> merge_state+0x7c/0x150 >> >>> Feb 14 02:06:16 lupus kernel: [ 93.969285] [<ffffffff81330b21>] >> ? >> >>> read_extent_buffer_pages+0x2d1/0x470 >> >>> Feb 14 02:06:16 lupus kernel: [ 93.969378] [<ffffffff81305060>] >> ? >> >>> btree_get_extent+0x0/0x1c0 >> >>> Feb 14 02:06:16 lupus kernel: [ 93.969470] [<ffffffff8130674d>] >> ? >> >>> btree_read_extent_buffer_pages.clone.65+0x4d/0xa0 >> >>> Feb 14 02:06:16 lupus kernel: [ 93.969602] [<ffffffff813076f9>] >> ? >> >>> read_tree_block+0x39/0x60 >> >>> Feb 14 02:06:16 lupus kernel: [ 93.969694] [<ffffffff812ed5e6>] >> ? >> >>> read_block_for_search.clone.40+0x116/0x410 >> >>> Feb 14 02:06:16 lupus kernel: [ 93.969878] [<ffffffff812f0bc7>] >> ? >> >>> btrfs_search_slot+0x307/0xa00 >> >>> Feb 14 02:06:16 lupus kernel: [ 93.969970] [<ffffffff812f6b18>] >> ? >> >>> lookup_inline_extent_backref+0x98/0x4a0 >> >>> Feb 14 02:06:16 lupus kernel: [ 93.970065] [<ffffffff810e33d7>] >> ? >> >>> kmem_cache_alloc+0x87/0xa0 >> >>> Feb 14 02:06:16 lupus kernel: [ 93.970157] [<ffffffff812f891c>] >> ? >> >>> __btrfs_free_extent+0xcc/0x6f0 >> >>> Feb 14 02:06:16 lupus kernel: [ 93.970249] [<ffffffff812f8434>] >> ? >> >>> update_block_group.clone.62+0xc4/0x280 >> >>> Feb 14 02:06:16 lupus kernel: [ 93.970343] [<ffffffff812fc4cf>] >> ? >> >>> run_clustered_refs+0x39f/0x880 >> >>> Feb 14 02:06:16 lupus kernel: [ 93.970436] [<ffffffff812fca77>] >> ? >> >>> btrfs_run_delayed_refs+0xc7/0x220 >> >>> Feb 14 02:06:16 lupus kernel: [ 93.970529] [<ffffffff810e15f9>] >> ? >> >>> new_slab+0x169/0x1f0 >> >>> Feb 14 02:06:16 lupus kernel: [ 93.970619] [<ffffffff8130c29c>] >> ? >> >>> btrfs_commit_transaction+0x7c/0x760 >> >>> Feb 14 02:06:16 lupus kernel: [ 93.970713] [<ffffffff81067ea0>] >> ? >> >>> autoremove_wake_function+0x0/0x30 >> >>> Feb 14 02:06:16 lupus kernel: [ 93.970806] [<ffffffff81305bc3>] >> ? >> >>> transaction_kthread+0x283/0x2a0 >> >>> Feb 14 02:06:16 lupus kernel: [ 93.970898] [<ffffffff81305940>] >> ? >> >>> transaction_kthread+0x0/0x2a0 >> >>> Feb 14 02:06:16 lupus kernel: [ 93.970990] [<ffffffff81305940>] >> ? >> >>> transaction_kthread+0x0/0x2a0 >> >>> Feb 14 02:06:16 lupus kernel: [ 93.971083] [<ffffffff81067a16>] >> ? >> >>> kthread+0x96/0xa0 >> >>> Feb 14 02:06:16 lupus kernel: [ 93.971174] [<ffffffff81003514>] >> ? >> >>> kernel_thread_helper+0x4/0x10 >> >>> Feb 14 02:06:16 lupus kernel: [ 93.971266] [<ffffffff81067980>] >> ? >> >>> kthread+0x0/0xa0 >> >>> Feb 14 02:06:16 lupus kernel: [ 93.971355] [<ffffffff81003510>] >> ? >> >>> kernel_thread_helper+0x0/0x10 >> >>> Feb 14 02:06:16 lupus kernel: [ 93.971444] Code: 55 b8 ff 00 00 >> 00 >> >>> 53 48 89 fb 48 83 ec 18 48 8b 6f 10 8b 3a 83 ff 04 0f 86 d5 00 00 >> 00 >> >>> 85 c9 0f 95 c1 83 ff 07 0f 86 d5 00 00 00 <48> 8b 45 50 bf 05 00 00 >> 00 >> >>> 48 89 06 84 c9 48 8b 85 68 fe ff ff >> >>> Feb 14 02:06:16 lupus kernel: [ 93.974280] RIP >> [<ffffffff8133ef1b>] >> >>> btrfs_encode_fh+0x2b/0x120 >> >>> Feb 14 02:06:16 lupus kernel: [ 93.974412] RSP >> <ffff88023c63b6e0> >> >>> Feb 14 02:06:16 lupus kernel: [ 93.974497] CR2: 0000030341ed0050 >> >>> Feb 14 02:06:16 lupus kernel: [ 93.974599] ---[ end trace >> >>> 3313552d105b1536 ]--- >> >>> Feb 14 02:07:04 lupus kernel: [ 141.906124] zcache: destroyed pool >> id=2 >> >>> Feb 14 02:07:17 lupus kernel: [ 154.783358] SysRq : Keyboard mode >> set >> >>> to system default >> >>> Feb 14 02:07:18 lupus kernel: [ 155.486147] SysRq : Terminate All >> Tasks >> >>> >> >>> >> >>> That's all for now >> >>> >> >>> Thanks & Regards >> >>> >> >>> Matt >> >>> >> >> >> >> (leaving out several folks from the CC to avoid spamming - if I left >> >> out someone wrongfully please re-add) >> >> >> >> running an addr2line reveals: >> >> >> >> >> >> addr2line -e /usr/src/linux-2.6.37_vanilla/vmlinux -i >> ffffffff81338cbb >> >> export.c:0 >> >> >> >> >> >> hope that helps >> >> >> >> >> >> Regards >> >> >> >> Matt >> >> >> > >> > Just my guessing. I might be wrong. >> > >> > __cleancache_flush_inode calls cleancache_get_key with >> cleancache_filekey. >> > cleancache_file_key's size is just 6 * u32. >> > cleancache_get_key calls btrfs_encode_fh with the key. >> > but btrfs_encode_fh does typecasting the key to btrfs_fid which is >> > bigger size than cleancache_filekey's one so it should not access >> > fields beyond cleancache_get_key. >> > >> > I think some file systems use extend fid so in there, this problem >> can >> > happen. I don't know why we can't find it earlier. Maybe Dan and >> > others test it for a long time. >> > >> > Am I missing something? >> > >> > >> > >> > -- >> > Kind regards, >> > Minchan Kim >> > >> >> reposting Minchan's message for reference to the btrfs mailing list >> while also adding >> >> Li Zefan, Miao Xie, Yan Zheng, Dan Rosenberg and Josef Bacik to CC >> >> Regards >> >> Matt > > Hi Matt and Minchan -- > > (BTRFS EXPERTS SEE *** BELOW) > > I definitely see a bug in cleancache_get_key in the monolithic > zcache+cleancache+frontswap patch I posted on oss.oracle.com > that is corrected in linux-next but I don't see how it could > get provoked by btrfs. > > The bug is that, in cleancache_get_key, the return value of fhfn should > be checked against 255. If the return value is 255, cleancache_get_key > should return -1. This should disable cleancache for any filesystem > where KEY_MAX is too large. > > But cleancache_get_key always calls fhfn with connectable == 0 and > CLEANCACHE_KEY_MAX==6 should be greater than BTRFS_FID_SIZE_CONNECTABLE > (which I think should be 5?). And the elements written into the > typecast btrfs_fid should be only writing the first 5 32-bit words. > > So if the problem is the one Minchan suggests, I am confused. Matt, > can you first confirm that you are using the cleancache patches from > my monolithic patch from oss.oracle.com (which I think you are)? > > *** > > Looking over the stacktrace and the code, I have an alternate theory. > I wonder if it is ever possible the inode->dentry list is empty > (or corrupt)? list_first_entry() assumes the list is non-empty. > If this is possible and unusual, maybe my testing didn't see the > problem? > > Thanks, > Dan > > P.S. For those new to cleancache, the code is in linux-next here: > http://git.kernel.org/?p=linux/kernel/git/sfr/linux-next.git;a=blob;f=mm/cleancache.c;h=f545eb8f11180cfb3aaf3f4f85a5255be8f9f881;hb=a57cb3bc013d2e262a663df50af6a9e7cc88bdad > Hi Dan, yeah, I downloaded the monolithic patch you mentioned in the original message (http://marc.info/?l=linux-kernel&m=129705217700769&w=2) and use that. Just checked the file's md5sum on my harddrive against the one from http://oss.oracle.com/projects/tmem/files/zcache/ and it's the same file (119d91d81d99fdf3b95919e6012d5fa8). If you could point out where to download the latest versions of each of the (broken-out) patches for frontswap, cleancache and zcache - or simply the updated ones needed - I'd give them another test run (read: try to use them for everyday tasks). Currently I've V5 of Cleancache, and V3 of Frontswap in addition to V2 of Zcache on my harddrive - I don't know if those are the most current ones available. Thanks Matt -- To unsubscribe, send a message with 'unsubscribe linux-mm' in the body to majordomo@xxxxxxxxxx For more info on Linux MM, see: http://www.linux-mm.org/ . Fight unfair telecom internet charges in Canada: sign http://stopthemeter.ca/ Don't email: <a href