git.openpandora.org / pandora-kernel.git / commit
? search:
summary | shortlog | log | commit | commitdiff | tree
(parent: a2b8601) | patch
[S390] qdio: EQBS retry after CCQ 96
authorJan Glauber <jang@linux.vnet.ibm.com>
Sun, 30 Oct 2011 14:17:06 +0000 (15:17 +0100)
committerMartin Schwidefsky <schwidefsky@de.ibm.com>
Sun, 30 Oct 2011 14:16:45 +0000 (15:16 +0100)
commit25f269f17316549e026c5dd0db7526411a504de6
tree05897a8a28ff4cd6e81cc7ef12da405ab820c4f3tree | snapshot
parenta2b86019826cb97fd964fbaf101410c64cd78681commit | diff
[S390] qdio: EQBS retry after CCQ 96

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>
drivers/s390/cio/qdio_main.c diff | blob | history
Pandora Kernel Repository