dm: use md pending for in flight IO counting

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This patch changes the counter for the number of in_flight I/Os
to md->pending from q->in_flight in preparation for a later patch.
No functional change.

Request-based dm used q->in_flight to count the number of in-flight
clones assuming the counter is always incremented for an in-flight
original request and original:clone is 1:1 relationship.
However, it this no longer true for barrier requests.
So use md->pending to count the number of in-flight clones.

Signed-off-by: Kiyoshi Ueda <k-ueda@ct.jp.nec.com>
Signed-off-by: Jun'ichi Nomura <j-nomura@ce.jp.nec.com>
Signed-off-by: Alasdair G Kergon <agk@redhat.com>

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Kiyoshi Ueda 2009-12-10 23:52:16 +00:00 • committed by Alasdair G Kergon

parent 9f518b27cf

commit b4324feeae

1 changed files with 18 additions and 28 deletions

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drivers/md/dm.c

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