btrfs: don't call btrfs_start_delalloc_roots in flushoncommit

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We're holding the sb_start_intwrite lock at this point, and doing async
filemap_flush of the inodes will result in a deadlock if we freeze the
fs during this operation.  This is because we could do a
btrfs_join_transaction() in the thread we are waiting on which would
block at sb_start_intwrite, and thus deadlock.  Using
writeback_inodes_sb() side steps the problem by not introducing all of
these extra locking dependencies.

Signed-off-by: Josef Bacik <jbacik@fb.com>
Signed-off-by: David Sterba <dsterba@suse.com>

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Josef Bacik 2017-10-19 14:16:01 -04:00 • committed by David Sterba

parent 0e0adbcfdc

commit ce8ea7cc6e

1 changed files with 10 additions and 1 deletions

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fs/btrfs/transaction.c

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