btrfs: make btrfs_buffered_write nowait compatible

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We need to avoid unconditionally calling balance_dirty_pages_ratelimited
as it could wait for some reason. Use balance_dirty_pages_ratelimited_flags
with the BDP_ASYNC in case the buffered write is nowait, returning
EAGAIN eventually.

It also moves the function after the again label. This can cause the
function to be called a bit later, but this should have no impact in the
real world.

Reviewed-by: Filipe Manana <fdmanana@suse.com>
Signed-off-by: Stefan Roesch <shr@fb.com>
Reviewed-by: David Sterba <dsterba@suse.com>
Signed-off-by: David Sterba <dsterba@suse.com>

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Stefan Roesch 2022-09-12 12:27:50 -07:00 • committed by David Sterba

parent 304e45acdb

commit 965f47aeb5

1 changed files with 5 additions and 2 deletions

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fs/btrfs/file.c

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