[S390] qdio: EQBS retry after CCQ 96

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Running under z/VM with QIOASSIST enabled, qdio queues could stall if EQBS
did not extract all SBAL states. Add an instant retry for EQBS and, if the
retry fails, set up a timer to ensure outstanding SBALs are processed later.

While at it, optimize qdio_do_eqbs and qdio_do_sqbs to eliminate 3 jumps on
the hot path.

Signed-off-by: Jan Glauber <jang@linux.vnet.ibm.com>
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>

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Jan Glauber 2011-10-30 15:17:06 +01:00 • committed by Martin Schwidefsky

parent a2b8601982

commit 25f269f173

1 changed files with 41 additions and 40 deletions

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drivers/s390/cio/qdio_main.c

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