xfs: rework the perag trace points to be perag centric

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So that they all output the same information in the traces to make
debugging refcount issues easier.

This means that all the lookup/drop functions no longer need to use
the full memory barrier atomic operations (atomic*_return()) so
will have less overhead when tracing is off. The set/clear tag
tracepoints no longer abuse the reference count to pass the tag -
the tag being cleared is obvious from the _RET_IP_ that is recorded
in the trace point.

Signed-off-by: Dave Chinner <dchinner@redhat.com>
Reviewed-by: Allison Henderson <allison.henderson@oracle.com>
Reviewed-by: Darrick J. Wong <djwong@kernel.org>

...

This commit is contained in:

Dave Chinner 2023-02-13 09:14:52 +11:00

parent c4d5660afb

commit 368e2d09b4

3 changed files with 22 additions and 28 deletions

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25

fs/xfs/libxfs/xfs_ag.c

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4

fs/xfs/xfs_icache.c

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21

fs/xfs/xfs_trace.h

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