diff options
| author | Peng Tao <bergwolf@gmail.com> | 2013-10-21 15:18:23 (GMT) |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2013-10-27 03:15:22 (GMT) |
| commit | 363090e74f3865c589f4026b40865596b0212f90 (patch) | |
| tree | 140b96be80752053ffa033a5a7d955c81ea17298 | |
| parent | 86bac591def1a5b7060c0834828b1eaabfe7f0a7 (diff) | |
| download | linux-fsl-qoriq-363090e74f3865c589f4026b40865596b0212f90.tar.xz | |
staging/lustre/llite: fix mkdir endless loop
Running on 3.11-rc4 kernel, I got below endless loop. It turns to be that Lustre
always saves the first page of a dir inode mapping at index ~0UL. And after
commit 5a720394 (mm: teach truncate_inode_pages_range() to handle non page
aligned ranges), truncate_inode_pages_range() _NO LONGER_ truncates the page
that is sitting at index ~0UL.
[16768.998006] mkdir R running task 0 2717 2716 0x00000080
[16768.998073] 000000000000000e 0000000000000000 0000000000000000 ffff88000be00460
[16768.998157] ffff88000ea65908 ffffffff810fec3e ffff88000ea65968 ffff8800229e7750
[16768.998241] ffff88000ea658b8 0000000000000000 0000000000000000 ffff88000ea65958
[16768.998326] Call Trace:
[16768.998401] [<ffffffff810fc6ed>] ? rcu_read_unlock+0x1c/0x2d
[16768.998473] [<ffffffff810fec3e>] ? find_get_pages+0xf5/0x11b
[16768.998530] [<ffffffff811078f0>] ? pagevec_lookup+0x20/0x2a
[16768.998586] [<ffffffff8110920e>] ? truncate_inode_pages_range.part.2+0x161/0x39a
[16768.998680] [<ffffffffa02ad5dc>] ? ll_md_blocking_ast+0x338/0x62f [lustre]
[16768.998744] [<ffffffff8110947f>] ? truncate_inode_pages_range+0x38/0x3f
[16768.998805] [<ffffffff811094f8>] ? truncate_inode_pages+0x12/0x14
[16768.998871] [<ffffffffa02ad6e8>] ? ll_md_blocking_ast+0x444/0x62f [lustre]
[16768.998948] [<ffffffff810981b5>] ? arch_local_irq_save+0x9/0xc
[16768.999022] [<ffffffffa07ee0e8>] ? ldlm_cancel_callback+0x67/0x12a [ptlrpc]
[16768.999100] [<ffffffffa07f85b2>] ? ldlm_cli_cancel_local+0xf3/0x2bc [ptlrpc]
[16768.999176] [<ffffffffa07f9163>] ? ldlm_cli_cancel_list_local+0x7e/0x1e4 [ptlrpc]
[16768.999268] [<ffffffffa07f9473>] ? ldlm_cancel_resource_local+0x1aa/0x1b9 [ptlrpc]
[16768.999385] [<ffffffffa0657bad>] ? mdc_resource_get_unused+0xf8/0x115 [mdc]
[16768.999472] [<ffffffff8109c887>] ? trace_hardirqs_on+0xd/0xf
[16768.999533] [<ffffffffa06583d8>] ? mdc_create+0x11e/0x4db [mdc]
[16768.999597] [<ffffffff8152ed84>] ? mutex_unlock+0xe/0x10
[16768.999654] [<ffffffffa0350e99>] ? lmv_create+0x355/0x3e9 [lmv]
[16768.999712] [<ffffffff811553b7>] ? final_putname+0x35/0x39
[16768.999775] [<ffffffffa02ae167>] ? ll_new_node+0x33b/0x3ff [lustre]
[16768.999841] [<ffffffffa02ae62c>] ? ll_mkdir+0xf2/0x127 [lustre]
[16768.999897] [<ffffffff81156996>] ? vfs_mkdir+0x84/0xc9
[16768.999961] [<ffffffff81158cf8>] ? SyS_mkdirat+0x77/0xad
[16769.000014] [<ffffffff81158d47>] ? SyS_mkdir+0x19/0x1b
[16769.000066] [<ffffffff81538652>] ? system_call_fastpath+0x16/0x1b
Signed-off-by: Peng Tao <bergwolf@gmail.com>
Signed-off-by: Andreas Dilger <andreas.dilger@intel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
| -rw-r--r-- | drivers/staging/lustre/lustre/include/lustre_lite.h | 6 |
1 files changed, 5 insertions, 1 deletions
diff --git a/drivers/staging/lustre/lustre/include/lustre_lite.h b/drivers/staging/lustre/lustre/include/lustre_lite.h index 25f8bfa..beccb5e 100644 --- a/drivers/staging/lustre/lustre/include/lustre_lite.h +++ b/drivers/staging/lustre/lustre/include/lustre_lite.h @@ -139,7 +139,11 @@ static inline unsigned long hash_x_index(__u64 hash, int hash64) { if (BITS_PER_LONG == 32 && hash64) hash >>= 32; - return ~0UL - hash; + /* save hash 0 as index 0 because otherwise we'll save it at + * page index end (~0UL) and it causes truncate_inode_pages_range() + * to loop forever. + */ + return ~0UL - (hash + !hash); } /** @} lite */ |