btrfs: use GFP_NOWAIT for tree block readahead

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extent_buffer readahead should not be able to painfully stall a
search_slot and hog tree locks by getting stuck in direct reclaim.

If the allocation fails, that is fine, we simply fail to do the
readahead in that case.

Reviewed-by: Jeff Layton <jlayton@kernel.org>
Reviewed-by: Filipe Manana <fdmanana@suse.com>
Signed-off-by: Boris Burkov <boris@bur.io>
Reviewed-by: David Sterba <dsterba@suse.com>
Signed-off-by: David Sterba <dsterba@suse.com>

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Boris Burkov 2026-07-21 15:42:15 -07:00 • committed by David Sterba

parent 6b338068ac

commit 536e94a4c3

1 changed files with 2 additions and 1 deletions

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fs/btrfs/extent_io.c

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