On Sat, Dec 01, 2007 at 12:23:02PM -0800, Andrew Morton wrote: > (switched to email - please respond via emailed reply-to-all, not via the > bugzilla web interface) > > On Sat, 1 Dec 2007 11:54:11 -0800 (PST) [EMAIL PROTECTED] wrote: > > > http://bugzilla.kernel.org/show_bug.cgi?id=9482 ... > Damn that's odd. General Protection Fault in > __set_page_dirty->__percpu_counter_add(). No sign of AOE in the trace. > > I assume that it is repeatable and that it doesn't occur with mkfs on > regular local disk drives?
I am encountering this same problem during testing of some patches I would like to send to the LKML, applied to 2.6.24-rc3, and I can trip this problem with just, echo > /dev/etherd/e7.0 ... at which point I get the trace below. (I had added a couple of checks for 0xffffffffffffffff pointers to __percpu_counter_add.) I haven't been able to check the unpatched aoe driver, but it looks the same. Unable to handle kernel paging request at ffffffffffffffff RIP: [<ffffffff8036d597>] __percpu_counter_add+0x24/0x6d PGD 203067 PUD 204067 PMD 0 Oops: 0000 [1] SMP CPU 0 Modules linked in: aoe Pid: 2860, comm: bash Not tainted 2.6.24-rc3-47dbg #5 RIP: 0010:[<ffffffff8036d597>] [<ffffffff8036d597>] __percpu_counter_add+0x24/0x6d RSP: 0018:ffff81007a0fbaa8 EFLAGS: 00010092 RAX: ffffffffffffffff RBX: ffff81007fcc48e0 RCX: 0000000000000010 RDX: 0000000000000000 RSI: 0000000000000001 RDI: ffff81007ace7240 RBP: ffff81007a0fbac8 R08: ffff81007cc077b0 R09: ffffffff802ae5ee R10: ffff81007a0fbaa8 R11: ffff810077dd99d8 R12: ffff81007ace7240 R13: 0000000000000000 R14: 0000000000000200 R15: ffff810078473bb0 FS: 00002ba601c5cdb0(0000) GS:ffffffff8078b000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 000000008005003b CR2: ffffffffffffffff CR3: 0000000077c31000 CR4: 00000000000006e0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 0000000000000400 Process bash (pid: 2860, threadinfo ffff81007a0fa000, task ffff81007bf48040) Stack: ffff81007a0fbac8 ffff81007fcc48e0 ffff81007c81c380 0000000000000000 ffff81007a0fbaf8 ffffffff802ae682 000010007a0fbae8 ffff810078473bb0 0000000000000200 ffff81007fcc48e0 ffff81007a0fbb18 ffffffff802ae75c Call Trace: [<ffffffff802ae682>] __set_page_dirty+0xdc/0x121 [<ffffffff802ae75c>] mark_buffer_dirty+0x95/0x99 [<ffffffff802ae7d2>] __block_commit_write+0x72/0xac [<ffffffff802ae988>] block_write_end+0x4f/0x5b [<ffffffff802b243f>] blkdev_write_end+0x1b/0x38 [<ffffffff80265d96>] generic_file_buffered_write+0x1c0/0x648 [<ffffffff8023a752>] current_fs_time+0x22/0x29 [<ffffffff80266576>] __generic_file_aio_write_nolock+0x358/0x3c2 [<ffffffff80266c84>] filemap_fault+0x1c4/0x320 [<ffffffff80264cce>] unlock_page+0x2d/0x31 [<ffffffff802666dd>] generic_file_aio_write_nolock+0x3b/0x8d [<ffffffff8028e40f>] do_sync_write+0xe2/0x126 [<ffffffff802497d0>] autoremove_wake_function+0x0/0x38 [<ffffffff8058e705>] do_page_fault+0x3f8/0x7bb [<ffffffff8028cae8>] fd_install+0x5f/0x68 [<ffffffff8028eb98>] vfs_write+0xae/0x137 [<ffffffff8028f102>] sys_write+0x47/0x70 [<ffffffff8020b7ae>] system_call+0x7e/0x83 Code: 4c 8b 2c d0 49 63 45 00 48 8d 1c 30 48 63 c1 48 39 c3 7d 0a RIP [<ffffffff8036d597>] __percpu_counter_add+0x24/0x6d RSP <ffff81007a0fbaa8> CR2: ffffffffffffffff BUG: sleeping function called from invalid context at kernel/rwsem.c:20 in_atomic():0, irqs_disabled():1 INFO: lockdep is turned off. Call Trace: [<ffffffff802518cb>] debug_show_held_locks+0x1b/0x24 [<ffffffff8022f352>] __might_sleep+0xc7/0xc9 [<ffffffff8024c4d0>] down_read+0x1d/0x4a [<ffffffff80237bd8>] exit_mm+0x34/0xf7 [<ffffffff8023933e>] do_exit+0x247/0x75b [<ffffffff8058e9d4>] do_page_fault+0x6c7/0x7bb [<ffffffff8058a81a>] thread_return+0x42/0x86 [<ffffffff88002698>] :aoe:aoeblk_make_request+0x1e8/0x1f5 [<ffffffff8058cb6d>] error_exit+0x0/0x9a [<ffffffff802ae5ee>] __set_page_dirty+0x48/0x121 [<ffffffff8036d597>] __percpu_counter_add+0x24/0x6d [<ffffffff802ae682>] __set_page_dirty+0xdc/0x121 [<ffffffff802ae75c>] mark_buffer_dirty+0x95/0x99 [<ffffffff802ae7d2>] __block_commit_write+0x72/0xac [<ffffffff802ae988>] block_write_end+0x4f/0x5b [<ffffffff802b243f>] blkdev_write_end+0x1b/0x38 [<ffffffff80265d96>] generic_file_buffered_write+0x1c0/0x648 [<ffffffff8023a752>] current_fs_time+0x22/0x29 [<ffffffff80266576>] __generic_file_aio_write_nolock+0x358/0x3c2 [<ffffffff80266c84>] filemap_fault+0x1c4/0x320 [<ffffffff80264cce>] unlock_page+0x2d/0x31 [<ffffffff802666dd>] generic_file_aio_write_nolock+0x3b/0x8d [<ffffffff8028e40f>] do_sync_write+0xe2/0x126 [<ffffffff802497d0>] autoremove_wake_function+0x0/0x38 [<ffffffff8058e705>] do_page_fault+0x3f8/0x7bb [<ffffffff8028cae8>] fd_install+0x5f/0x68 [<ffffffff8028eb98>] vfs_write+0xae/0x137 [<ffffffff8028f102>] sys_write+0x47/0x70 [<ffffffff8020b7ae>] system_call+0x7e/0x83 -- Ed L Cashin <[EMAIL PROTECTED]> -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to [EMAIL PROTECTED] More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
