Mark, Is a read only work load or a combination of a read / write workload? -- Milosz On Fri, Sep 6, 2013 at 7:52 PM, Mark Moseley <moseleymark@xxxxxxxxx> wrote: > Was testing out fscache for the first time in a while. On a fairly busy > box, I got this after about an hour of traffic. OS is Ubuntu Precise > 64-bit, on a Dell Poweredge 420. The cache is on a 500gb SATA drive: > > /dev/sdb1 480590564 5927608 450227244 2% /var/cache/fscache > > > kernel: [ 3962.680184] BUG: unable to handle kernel NULL pointer > dereference at 0000000000000010 > kernel: [ 3962.688990] IP: [<ffffffff812910c3>] > __fscache_uncache_page+0x23/0x160 > kernel: [ 3962.696319] PGD 0 > kernel: [ 3962.698584] Thread overran stack, or stack corrupted > kernel: [ 3962.704140] Oops: 0000 [#1] SMP > kernel: [ 3962.707782] Modules linked in: dell_rbu aesni_intel microcode > sb_edac wmi edac_core hid_generic usbhid hid > kernel: [ 3962.718724] CPU: 5 PID: 32383 Comm: php Not tainted 3.10.10 #1 > kernel: [ 3962.725249] Hardware name: Dell Inc. PowerEdge R420/072XWF, BIOS > 1.3.5 08/21/2012 > kernel: [ 3962.753557] task: ffff8801f1004890 ti: ffff8801f1004e10 task.ti: > ffff8801f1004e10 > kernel: [ 3962.761931] RIP: 0010:[<ffffffff812910c3>] [<ffffffff812910c3>] > __fscache_uncache_page+0x23/0x160 > kernel: [ 3962.771973] RSP: 0018:ffff88003e3ef8c8 EFLAGS: 00210282 > kernel: [ 3962.777917] RAX: 0000000000000000 RBX: ffff8800b7037438 RCX: > ffff88022ffc75e8 > kernel: [ 3962.785903] RDX: 000000000000014e RSI: ffffea000ee5eb00 RDI: > ffff8800b7037438 > kernel: [ 3962.793889] RBP: ffff88003e3ef8e8 R08: 0000000000000001 R09: > 0000000000000005 > kernel: [ 3962.801893] R10: 0000000000000000 R11: 0000000000000000 R12: > ffffea000ee5eb00 > kernel: [ 3962.809895] R13: ffff8804190477d8 R14: 0000000000000000 R15: > 0000000000000000 > kernel: [ 3962.817892] FS: 0000000000000000(0000) > GS:ffff88042fc40000(0063) knlGS:00000000e347c700 > kernel: [ 3962.826985] CS: 0010 DS: 002b ES: 002b CR0: 0000000080050033 > kernel: [ 3962.833434] CR2: 0000000000000010 CR3: 0000000001d6c000 CR4: > 00000000000607f0 > kernel: [ 3962.841438] DR0: 0000000000000000 DR1: 0000000000000000 DR2: > 0000000000000000 > kernel: [ 3962.849444] DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: > 0000000000000400 > kernel: [ 3962.857448] Stack: > kernel: [ 3962.859711] ffffea000ee5eb00 ffffea000ee5eb00 ffff8800b7037438 > ffff8804190477d8 > kernel: [ 3962.868086] ffff88003e3ef908 ffffffff81353522 ffffea000ee5eb00 > 0000000000000000 > kernel: [ 3962.876460] ffff88003e3ef928 ffffffff81342ca0 ffffea000ee5eb00 > ffff8804190477d8 > kernel: [ 3962.884832] Call Trace: > kernel: [ 3962.887598] [<ffffffff81353522>] > __nfs_fscache_invalidate_page+0x42/0x70 > kernel: [ 3962.895216] [<ffffffff81342ca0>] nfs_invalidate_page+0x60/0x80 > kernel: [ 3962.901863] [<ffffffff811aaf99>] truncate_inode_page+0x89/0x90 > kernel: [ 3962.908507] [<ffffffff811ab102>] > truncate_inode_pages_range+0x162/0x4b0 > kernel: [ 3962.916030] [<ffffffff81d44869>] ? mutex_unlock+0x19/0x20 > kernel: [ 3962.922191] [<ffffffff811c4a88>] ? > unmap_mapping_range+0x98/0x180 > kernel: [ 3962.929128] [<ffffffff811ab4fd>] truncate_inode_pages+0x2d/0x40 > kernel: [ 3962.955657] [<ffffffff811ab55f>] truncate_pagecache+0x4f/0x70 > kernel: [ 3962.962206] [<ffffffff81344080>] > nfs_setattr_update_inode+0xa0/0x120 > kernel: [ 3962.969433] [<ffffffff813568b4>] nfs3_proc_setattr+0xc4/0xe0 > kernel: [ 3962.975883] [<ffffffff813457bf>] nfs_setattr+0xcf/0x170 > kernel: [ 3962.981848] [<ffffffff8121d5bb>] notify_change+0x1cb/0x390 > kernel: [ 3962.988107] [<ffffffff811fa73b>] do_truncate+0x7b/0xc0 > kernel: [ 3962.993975] [<ffffffff8120f63f>] do_last+0x6bf/0x1110 > kernel: [ 3962.999746] [<ffffffff8120bc12>] ? link_path_walk+0x242/0x930 > kernel: [ 3963.006283] [<ffffffff81210151>] path_openat+0xc1/0x4d0 > kernel: [ 3963.012247] [<ffffffff812109cd>] do_filp_open+0x4d/0xb0 > kernel: [ 3963.018211] [<ffffffff811fbb74>] do_sys_open+0x104/0x250 > kernel: [ 3963.024275] [<ffffffff8125a016>] compat_SyS_open+0x36/0x50 > kernel: [ 3963.030531] [<ffffffff81d5272c>] sysenter_dispatch+0x7/0x24 > kernel: [ 3963.036969] Code: ff eb a7 0f 1f 44 00 00 66 66 66 66 90 55 48 > 89 e5 48 83 ec 20 48 89 5d e8 48 89 fb 4c 89 65 f0 4c 89 6d f8 49 89 f4 48 > 8b 43 40 <80> 78 10 00 0f 84 c0 00 00 00 4d 85 e4 0f 84 ed 00 00 00 f0 ff > kernel: [ 3963.059163] RIP [<ffffffff812910c3>] > __fscache_uncache_page+0x23/0x160 > kernel: [ 3963.066599] RSP <ffff88003e3ef8c8> > kernel: [ 3963.070521] CR2: 0000000000000010 > kernel: [ 3963.075102] ---[ end trace 454db2fd8476c38c ]--- > -- > Linux-cachefs mailing list > Linux-cachefs@xxxxxxxxxx > https://www.redhat.com/mailman/listinfo/linux-cachefs -- Linux-cachefs mailing list Linux-cachefs@xxxxxxxxxx https://www.redhat.com/mailman/listinfo/linux-cachefs
