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Date: Wed, 25 May 2011 22:01:38 +0300
From: Amir Goldstein <amir73il@...il.com>
To: Theodore Tso <tytso@....edu>,
Allison Henderson <achender@...ux.vnet.ibm.com>
Cc: Ext4 Developers List <linux-ext4@...r.kernel.org>
Subject: hang in xfstest 204 with dev branch
Hi,
When running xfstests with 4K blocksize, test 204 (Test out ENOSPC
flushing on small filesystems)
hangs in an interruptible sleep (I can release it with ctrl-C).
git bisect points at commit fc0d5c38963ed655e974025c63290563c172038a
ext4: add flag to ext4_has_free_blocks
as the offender.
Following is the stack dump of hung tasks (immediately after running test 204):
[ 406.974191] SysRq : Show Blocked State
[ 406.974198] task PC stack pid father
[ 406.974234] 204 D ffff88010b763148 0 2002 1797 0x00000000
[ 406.974239] ffff880109621bd8 0000000000000082 ffff880100000000
0000000300000001
[ 406.974243] ffff880109621b78 ffff880109621fd8 ffff880109620000
ffff880109621fd8
[ 406.974247] ffff880128f34470 ffff88010b762da0 ffff880109621bd8
0000000181084ec0
[ 406.974250] Call Trace:
[ 406.974260] [<ffffffff81241d05>] jbd2_log_wait_commit+0xb5/0x130
[ 406.974264] [<ffffffff81084c10>] ? wake_up_bit+0x40/0x40
[ 406.974267] [<ffffffff81243c26>] ? __jbd2_log_start_commit+0x96/0xa0
[ 406.974270] [<ffffffff81243d6b>] jbd2_journal_force_commit_nested+0x5b/0xa0
[ 406.974274] [<ffffffff811f3f1f>] ext4_should_retry_alloc+0x5f/0x70
[ 406.974277] [<ffffffff81205c5b>] ext4_create+0x11b/0x140
[ 406.974281] [<ffffffff8116c101>] vfs_create+0xb1/0x110
[ 406.974284] [<ffffffff8116c796>] do_last+0x636/0x960
[ 406.974287] [<ffffffff8116cc4b>] path_openat+0xcb/0x3c0
[ 406.974290] [<ffffffff8116cf82>] do_filp_open+0x42/0xa0
[ 406.974293] [<ffffffff81179707>] ? alloc_fd+0xf7/0x150
[ 406.974297] [<ffffffff8115d1a1>] do_sys_open+0x101/0x1d0
[ 406.974299] [<ffffffff8115d290>] sys_open+0x20/0x30
[ 406.974304] [<ffffffff815ad242>] system_call_fastpath+0x16/0x1b
[ 406.974306] jbd2/sda8-8 D ffff88010f1ac818 0 2167 2 0x00000000
[ 406.974309] ffff88010d3a9bc0 0000000000000046 ffff880100000000
ffffffff81109a89
[ 406.974313] ffff880109fd2958 ffff88010d3a9fd8 ffff88010d3a8000
ffff88010d3a9fd8
[ 406.974317] ffffffff81a0b020 ffff88010f1ac470 ffff88010d3a9b90
000000012fc13fc0
[ 406.974320] Call Trace:
[ 406.974324] [<ffffffff81109a89>] ? mempool_alloc+0x59/0x140
[ 406.974328] [<ffffffff8118aa20>] ? __wait_on_buffer+0x30/0x30
[ 406.974332] [<ffffffff815a2c1c>] io_schedule+0x8c/0xd0
[ 406.974334] [<ffffffff8118aa2e>] sleep_on_buffer+0xe/0x20
[ 406.974338] [<ffffffff815a36ef>] __wait_on_bit+0x5f/0x90
[ 406.974341] [<ffffffff8118aa20>] ? __wait_on_buffer+0x30/0x30
[ 406.974343] [<ffffffff815a379c>] out_of_line_wait_on_bit+0x7c/0x90
[ 406.974347] [<ffffffff81084c50>] ? autoremove_wake_function+0x40/0x40
[ 406.974350] [<ffffffff8118aa1e>] __wait_on_buffer+0x2e/0x30
[ 406.974353] [<ffffffff8123e70d>]
jbd2_journal_commit_transaction+0x140d/0x1580
[ 406.974357] [<ffffffff8100a6e0>] ? __switch_to+0xc0/0x2f0
[ 406.974360] [<ffffffff81241e4b>] kjournald2+0xbb/0x220
[ 406.974363] [<ffffffff81084c10>] ? wake_up_bit+0x40/0x40
[ 406.974366] [<ffffffff81241d90>] ? commit_timeout+0x10/0x10
[ 406.974369] [<ffffffff81084476>] kthread+0x96/0xa0
[ 406.974372] [<ffffffff815ae364>] kernel_thread_helper+0x4/0x10
[ 406.974375] [<ffffffff810843e0>] ? flush_kthread_worker+0xb0/0xb0
[ 406.974378] [<ffffffff815ae360>] ? gs_change+0x13/0x13
Amir.
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