Theodore Ts'o <tytso@xxxxxxx> writes: > On Tue, Dec 02, 2014 at 06:28:20PM +0400, Dmitry Monakhov wrote: >> Testcase: >> xfstests generic/270 >> MKFS_OPTIONS="-q -I 256 -O inline_data,64bit" >> >> Call Trace: >> [<ffffffff81144c76>] lock_page+0x35/0x39 -------> DEADLOCK >> [<ffffffff81145260>] pagecache_get_page+0x65/0x15a >> [<ffffffff811507fc>] truncate_inode_pages_range+0x1db/0x45c >> [<ffffffff8120ea63>] ? ext4_da_get_block_prep+0x439/0x4b6 >> [<ffffffff811b29b7>] ? __block_write_begin+0x284/0x29c >> [<ffffffff8120e62a>] ? ext4_change_inode_journal_flag+0x16b/0x16b >> [<ffffffff81150af0>] truncate_inode_pages+0x12/0x14 >> [<ffffffff81247cb4>] ext4_truncate_failed_write+0x19/0x25 >> [<ffffffff812488cf>] ext4_da_write_inline_data_begin+0x196/0x31c >> [<ffffffff81210dad>] ext4_da_write_begin+0x189/0x302 >> [<ffffffff810c07ac>] ? trace_hardirqs_on+0xd/0xf >> [<ffffffff810ddd13>] ? read_seqcount_begin.clone.1+0x9f/0xcc >> [<ffffffff8114309d>] generic_perform_write+0xc7/0x1c6 >> [<ffffffff810c040e>] ? mark_held_locks+0x59/0x77 >> [<ffffffff811445d1>] __generic_file_write_iter+0x17f/0x1c5 >> [<ffffffff8120726b>] ext4_file_write_iter+0x2a5/0x354 >> [<ffffffff81185656>] ? file_start_write+0x2a/0x2c >> [<ffffffff8107bcdb>] ? bad_area_nosemaphore+0x13/0x15 >> [<ffffffff811858ce>] new_sync_write+0x8a/0xb2 >> [<ffffffff81186e7b>] vfs_write+0xb5/0x14d >> [<ffffffff81186ffb>] SyS_write+0x5c/0x8c >> [<ffffffff816f2529>] system_call_fastpath+0x12/0x17 >> >> Signed-off-by: Dmitry Monakhov <dmonakhov@xxxxxxxxxx> > > This patch makes sense but I haven't been able to duplicate the > failure. Maybe it's sensitive to the size of the scratch device, or > some such? I use xfstest-bld. So our test environment should be equals. Unfortunately this is is not 100% reproducible, that is why I've missed that bug on first test-run. Even more yesterday I've scheduled inline_data tests to run for a whole night and it is deadlocked again in almost the same place :) [<ffffffff816f1698>] rwsem_down_write_failed+0x216/0x283 ->want xattr_sem -> DEADLOCK [<ffffffff81414763>] call_rwsem_down_write_failed+0x13/0x20 [<ffffffff816f0eb3>] ? down_write+0x98/0xbc [<ffffffff81249c9e>] ? ext4_inline_data_truncate+0x96/0x2c6 [<ffffffff81249c9e>] ext4_inline_data_truncate+0x96/0x2c6 [<ffffffff81210335>] ext4_truncate+0x171/0x432 [<ffffffff8124870c>] ext4_truncate_failed_write+0x21/0x25 [<ffffffff81249332>] ext4_da_write_inline_data_begin+0x1a9/0x33a ->holds xattr_sem I'll send you updated version in a minute.
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