From: Sean Noonan <Sean.Noonan@twosigma.com>
To: 'Christoph Hellwig' <hch@infradead.org>
Cc: 'Michel Lespinasse' <walken@google.com>,
"'linux-kernel@vger.kernel.org'" <linux-kernel@vger.kernel.org>,
Martin Bligh <Martin.Bligh@twosigma.com>,
Trammell Hudson <Trammell.Hudson@twosigma.com>,
Christos Zoulas <Christos.Zoulas@twosigma.com>,
"'linux-xfs@oss.sgi.com'" <linux-xfs@oss.sgi.com>,
Stephen Degler <Stephen.Degler@twosigma.com>,
"'linux-mm@kvack.org'" <linux-mm@kvack.org>
Subject: RE: XFS memory allocation deadlock in 2.6.38
Date: Tue, 29 Mar 2011 15:54:12 -0400 [thread overview]
Message-ID: <081DDE43F61F3D43929A181B477DCA95639B535D@MSXAOA6.twosigma.com> (raw)
In-Reply-To: <20110329192434.GA10536@infradead.org>
> Can you check if the brute force patch below helps?
Not sure if this helps at all, but here is the stack from all three processes involved. This is without MAP_POPULATE and with the patch you just sent.
# ps aux | grep 'D[+]*[[:space:]]'
USER PID %CPU %MEM VSZ RSS TTY STAT START TIME COMMAND
root 2314 0.2 0.0 0 0 ? D 19:44 0:00 [flush-8:0]
root 2402 0.0 0.0 0 0 ? D 19:44 0:00 [xfssyncd/sda9]
root 3861 2.6 9.9 16785280 4912848 pts/0 D+ 19:45 0:07 ./vmtest /xfs/hugefile.dat 17179869184
# for p in 2314 2402 3861; do echo $p; cat /proc/$p/stack; done
2314
[<ffffffff810d634a>] congestion_wait+0x7a/0x130
[<ffffffff8129721c>] kmem_alloc+0x6c/0xf0
[<ffffffff8127c07e>] xfs_inode_item_format+0x36e/0x3b0
[<ffffffff8128401f>] xfs_log_commit_cil+0x4f/0x3b0
[<ffffffff8128ff31>] _xfs_trans_commit+0x1f1/0x2b0
[<ffffffff8127c716>] xfs_iomap_write_allocate+0x1a6/0x340
[<ffffffff81298883>] xfs_map_blocks+0x193/0x2c0
[<ffffffff812992fa>] xfs_vm_writepage+0x1ca/0x520
[<ffffffff810c4bd2>] __writepage+0x12/0x40
[<ffffffff810c53dd>] write_cache_pages+0x1dd/0x4f0
[<ffffffff810c573c>] generic_writepages+0x4c/0x70
[<ffffffff812986b8>] xfs_vm_writepages+0x58/0x70
[<ffffffff810c577c>] do_writepages+0x1c/0x40
[<ffffffff811247d1>] writeback_single_inode+0xf1/0x240
[<ffffffff81124edd>] writeback_sb_inodes+0xdd/0x1b0
[<ffffffff81125966>] writeback_inodes_wb+0x76/0x160
[<ffffffff81125d93>] wb_writeback+0x343/0x550
[<ffffffff81126126>] wb_do_writeback+0x186/0x2e0
[<ffffffff81126342>] bdi_writeback_thread+0xc2/0x310
[<ffffffff81067846>] kthread+0x96/0xa0
[<ffffffff8165a414>] kernel_thread_helper+0x4/0x10
[<ffffffffffffffff>] 0xffffffffffffffff
2402
[<ffffffff8106d0ec>] down+0x3c/0x50
[<ffffffff8129a7bd>] xfs_buf_lock+0x5d/0x170
[<ffffffff8128a87d>] xfs_getsb+0x1d/0x50
[<ffffffff81291bcf>] xfs_trans_getsb+0x5f/0x150
[<ffffffff8128b80e>] xfs_mod_sb+0x4e/0xe0
[<ffffffff81271dbf>] xfs_fs_log_dummy+0x4f/0x90
[<ffffffff812a61c1>] xfs_sync_worker+0x81/0x90
[<ffffffff812a6092>] xfssyncd+0x172/0x220
[<ffffffff81067846>] kthread+0x96/0xa0
[<ffffffff8165a414>] kernel_thread_helper+0x4/0x10
[<ffffffffffffffff>] 0xffffffffffffffff
3861
[<ffffffff812ec744>] call_rwsem_down_read_failed+0x14/0x30
[<ffffffff812754dd>] xfs_ilock+0x9d/0x110
[<ffffffff8127556e>] xfs_ilock_map_shared+0x1e/0x50
[<ffffffff81297c45>] __xfs_get_blocks+0xc5/0x4e0
[<ffffffff8129808c>] xfs_get_blocks+0xc/0x10
[<ffffffff81135ca2>] do_mpage_readpage+0x462/0x660
[<ffffffff81135eea>] mpage_readpage+0x4a/0x60
[<ffffffff812986e3>] xfs_vm_readpage+0x13/0x20
[<ffffffff810bd150>] filemap_fault+0x2d0/0x4e0
[<ffffffff810db0a0>] __do_fault+0x50/0x4f0
[<ffffffff810db85e>] handle_pte_fault+0x7e/0xc90
[<ffffffff810ddbf8>] handle_mm_fault+0x138/0x230
[<ffffffff8102b37c>] do_page_fault+0x12c/0x420
[<ffffffff81658fcf>] page_fault+0x1f/0x30
[<ffffffffffffffff>] 0xffffffffffffffff
--
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next prev parent reply other threads:[~2011-03-29 19:57 UTC|newest]
Thread overview: 24+ messages / expand[flat|nested] mbox.gz Atom feed top
[not found] <081DDE43F61F3D43929A181B477DCA95639B52FD@MSXAOA6.twosigma.com>
[not found] ` <081DDE43F61F3D43929A181B477DCA95639B5327@MSXAOA6.twosigma.com>
2011-03-24 17:43 ` Christoph Hellwig
2011-03-24 23:45 ` Michel Lespinasse
2011-03-28 14:58 ` Sean Noonan
2011-03-28 21:06 ` Michel Lespinasse
2011-03-28 21:34 ` Sean Noonan
2011-03-29 0:25 ` Michel Lespinasse
2011-03-29 1:51 ` Dave Chinner
2011-03-29 2:49 ` Sean Noonan
2011-03-29 19:05 ` Sean Noonan
2011-03-29 19:24 ` 'Christoph Hellwig'
2011-03-29 19:39 ` Johannes Weiner
2011-03-29 19:43 ` 'Christoph Hellwig'
2011-03-29 19:46 ` Sean Noonan
2011-03-29 20:02 ` 'Christoph Hellwig'
2011-03-29 20:23 ` Sean Noonan
2011-03-29 22:42 ` Dave Chinner
2011-03-29 22:45 ` Sean Noonan
2011-03-30 9:23 ` 'Christoph Hellwig'
2011-03-29 19:54 ` Sean Noonan [this message]
2011-03-30 0:09 ` Dave Chinner
2011-03-30 1:32 ` Sean Noonan
2011-03-30 1:44 ` Dave Chinner
2011-03-30 1:52 ` Sean Noonan
2011-03-30 9:30 ` 'Christoph Hellwig'
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