btrfs: take into account global rsv in need_preemptive_reclaim

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Global rsv can't be used for normal allocations, and for very full file
systems we can decide to try and async flush constantly even though
there's really not a lot of space to reclaim.  Deal with this by
including the global block rsv size in the "total used" calculation.

Reviewed-by: Johannes Thumshirn <johannes.thumshirn@wdc.com>
Signed-off-by: Josef Bacik <josef@toxicpanda.com>
Signed-off-by: David Sterba <dsterba@suse.com>

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Josef Bacik 2021-04-28 13:38:44 -04:00 • committed by David Sterba

parent 0aae4ca9e9

commit 610a6ef44e

1 changed files with 3 additions and 1 deletions

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fs/btrfs/space-info.c

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