David, I saw the error posted below in my logs yesterday (the 3rd) for a short period of time. I did a quick google search / commit search and it looks like previously you fixed the same kind of issue for cachefilesd here http://www.redhat.com/archives/linux-cachefs/2011-September/msg00015.html . It's entirely possible that I'm doing this to myself with my fscache patches to ceph. And in that case a pointer where to look for the issue would be much appreciated. Thanks, - Milosz 3 15:12:45 pbnode-58019a39 kernel: [3609186.011415] BUG: Bad page state in process petabucket pfn:deb20c pbnode-58019a39/syslog Jul 3 15:12:45 pbnode-58019a39 kernel: [3609186.011423] page:ffffea0037ac8300 count:0 mapcount:0 mapping: (null) index:0x36 Jul 3 15:12:45 pbnode-58019a39 kernel: [3609186.011431] page flags: 0x200000000001000(private_2) Jul 3 15:12:45 pbnode-58019a39 kernel: [3609186.011438] Modules linked in: ceph libceph cachefiles ghash_clmulni_intel aesni_intel ablk_helper cryptd lrw gf128mul glue_helper aes_x86_64 microcode auth_rpcgss oid_registry nfsv4 nfs fscache lockd sunrpc raid10 raid456 async_pq async_xor async_memcpy async_raid6_recov async_tx raid1 multipath linear btrfs raid6_pq lzo_compress raid0 xor zlib_deflate libcrc32c Jul 3 15:12:45 pbnode-58019a39 kernel: [3609186.011465] CPU: 10 PID: 24155 Comm: petabucket Tainted: G B 3.10.0-rc6-virtual #11 Jul 3 15:12:45 pbnode-58019a39 kernel: [3609186.011467] 0000000000000001 ffff880d8e75da48 ffffffff8154f64b ffff880d8e75da68 Jul 3 15:12:45 pbnode-58019a39 kernel: [3609186.011472] ffffffff8111d8a7 0000000000000001 ffffea0037ac8300 ffff880d8e75daa8 Jul 3 15:12:45 pbnode-58019a39 kernel: [3609186.011477] ffffffff8111de5e ffffffff00000001 ffffea0037ac8300 0200000000001000 Jul 3 15:12:45 pbnode-58019a39 kernel: [3609186.011481] Call Trace: Jul 3 15:12:45 pbnode-58019a39 kernel: [3609186.011486] [<ffffffff8154f64b>] dump_stack+0x19/0x1b Jul 3 15:12:45 pbnode-58019a39 kernel: [3609186.011494] [<ffffffff8111d8a7>] bad_page+0xc7/0x120 Jul 3 15:12:45 pbnode-58019a39 kernel: [3609186.011498] [<ffffffff8111de5e>] free_pages_prepare+0x10e/0x120 Jul 3 15:12:45 pbnode-58019a39 kernel: [3609186.011502] [<ffffffff8111f660>] free_hot_cold_page+0x40/0x170 Jul 3 15:12:45 pbnode-58019a39 kernel: [3609186.011506] [<ffffffff81122f47>] __put_single_page+0x27/0x30 Jul 3 15:12:45 pbnode-58019a39 kernel: [3609186.011509] [<ffffffff81123865>] put_page+0x25/0x40 Jul 3 15:12:45 pbnode-58019a39 kernel: [3609186.011513] [<ffffffff811238d6>] put_pages_list+0x56/0x70 Jul 3 15:12:45 pbnode-58019a39 kernel: [3609186.011517] [<ffffffff811224eb>] __do_page_cache_readahead+0x1bb/0x260 Jul 3 15:12:45 pbnode-58019a39 kernel: [3609186.011521] [<ffffffff81122901>] ra_submit+0x21/0x30 Jul 3 15:12:45 pbnode-58019a39 kernel: [3609186.011524] [<ffffffff81118897>] filemap_fault+0x267/0x4a0 Jul 3 15:12:45 pbnode-58019a39 kernel: [3609186.011529] [<ffffffff8113a58f>] __do_fault+0x6f/0x4c0 Jul 3 15:12:45 pbnode-58019a39 kernel: [3609186.011532] [<ffffffff81004ec2>] ? xen_mc_flush+0xb2/0x1c0 Jul 3 15:12:45 pbnode-58019a39 kernel: [3609186.011534] [<ffffffff8113d440>] handle_pte_fault+0x90/0x860 Jul 3 15:12:45 pbnode-58019a39 kernel: [3609186.011537] [<ffffffff810092c3>] ? pte_mfn_to_pfn+0x93/0x110 Jul 3 15:12:45 pbnode-58019a39 kernel: [3609186.011540] [<ffffffff8100935e>] ? xen_pmd_val+0xe/0x10 Jul 3 15:12:45 pbnode-58019a39 kernel: [3609186.011543] [<ffffffff81005469>] ? __raw_callee_save_xen_pmd_val+0x11/0x1e Jul 3 15:12:45 pbnode-58019a39 kernel: [3609186.011546] [<ffffffff8113eea1>] handle_mm_fault+0x241/0x340 Jul 3 15:12:45 pbnode-58019a39 kernel: [3609186.011549] [<ffffffff8155925a>] __do_page_fault+0x1aa/0x550 Jul 3 15:12:45 pbnode-58019a39 kernel: [3609186.011552] [<ffffffff81004ec2>] ? xen_mc_flush+0xb2/0x1c0 Jul 3 15:12:45 pbnode-58019a39 kernel: [3609186.011555] [<ffffffff8100483d>] ? xen_clts+0x8d/0x190 Jul 3 15:12:45 pbnode-58019a39 kernel: [3609186.011559] [<ffffffff8155960e>] do_page_fault+0xe/0x10 Jul 3 15:12:45 pbnode-58019a39 kernel: [3609186.011563] [<ffffffff81555a98>] page_fault+0x28/0x30 -- Linux-cachefs mailing list Linux-cachefs@xxxxxxxxxx https://www.redhat.com/mailman/listinfo/linux-cachefs
