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| author | Jan Glauber <jang@linux.vnet.ibm.com> | 2011-10-30 14:17:06 (GMT) |
|---|---|---|
| committer | Martin Schwidefsky <schwidefsky@de.ibm.com> | 2011-10-30 14:16:45 (GMT) |
| commit | 25f269f17316549e026c5dd0db7526411a504de6 (patch) | |
| tree | 05897a8a28ff4cd6e81cc7ef12da405ab820c4f3 /Documentation/memory-barriers.txt | |
| parent | a2b86019826cb97fd964fbaf101410c64cd78681 (diff) | |
| download | linux-fsl-qoriq-25f269f17316549e026c5dd0db7526411a504de6.tar.xz | |
[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>
Diffstat (limited to 'Documentation/memory-barriers.txt')
0 files changed, 0 insertions, 0 deletions