btrfs: keep track of discard reuse stats

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Keep track of how much we are discarding and how often we are reusing
with async discard. The discard_*_bytes values don't need any special
protection because the work item provides the single threaded access.

Reviewed-by: Josef Bacik <josef@toxicpanda.com>
Signed-off-by: Dennis Zhou <dennis@kernel.org>
Reviewed-by: David Sterba <dsterba@suse.com>
Signed-off-by: David Sterba <dsterba@suse.com>

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Dennis Zhou 2020-01-02 16:26:41 -05:00 • committed by David Sterba

parent 5cb0724e1b

commit 9ddf648f9c

4 changed files with 58 additions and 0 deletions

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3

fs/btrfs/ctree.h

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5

fs/btrfs/discard.c

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14

fs/btrfs/free-space-cache.c

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36

fs/btrfs/sysfs.c

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