bcachefs: Avoid atomics in write fast path

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This adds some horrible hacks, but the atomic ops for closures were
getting to be a pretty expensive part of the write path. We don't want
to rip out closures entirely from the write path, because they're used
for e.g. waiting on the allocator, or waiting on the journal flush, and
that stuff would get really ugly without closures.

Signed-off-by: Kent Overstreet <kent.overstreet@gmail.com>
Signed-off-by: Kent Overstreet <kent.overstreet@linux.dev>

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Kent Overstreet 2019-11-01 21:16:51 -04:00 • committed by Kent Overstreet

parent f7f63211a4

commit f8f3086338

4 changed files with 65 additions and 50 deletions

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38

fs/bcachefs/fs-io.c

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74

fs/bcachefs/io.c

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2

fs/bcachefs/io.h

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1

fs/bcachefs/io_types.h

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