Btrfs: adjust outstanding_extents counter properly when dio write is split

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[ Upstream commit c2931667c8 ]

Currently how btrfs dio deals with split dio write is not good
enough if dio write is split into several segments due to the
lack of contiguous space, a large dio write like 'dd bs=1G count=1'
can end up with incorrect outstanding_extents counter and endio
would complain loudly with an assertion.

This fixes the problem by compensating the outstanding_extents
counter in inode if a large dio write gets split.

Reported-by: Anand Jain <anand.jain@oracle.com>
Tested-by: Anand Jain <anand.jain@oracle.com>
Signed-off-by: Liu Bo <bo.li.liu@oracle.com>
Signed-off-by: David Sterba <dsterba@suse.com>
Signed-off-by: Sasha Levin <alexander.levin@verizon.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

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Liu Bo 2016-12-22 17:13:54 -08:00 • committed by Greg Kroah-Hartman

parent 49fc90b443

commit f76ddff6c5

1 changed files with 9 additions and 2 deletions

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fs/btrfs/inode.c

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