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| author | Stefan Haberland <sth@linux.vnet.ibm.com> | 2016-02-12 13:50:52 (GMT) |
|---|---|---|
| committer | Martin Schwidefsky <schwidefsky@de.ibm.com> | 2016-02-17 08:24:07 (GMT) |
| commit | 12d319b920fa673a4d5e7c1785c5dc82dcd15257 (patch) | |
| tree | d118d395bbbe32bb3295ce739fcf63b63e45943d /arch | |
| parent | 52499d93d6dec3872de3b982219af6d4c182a452 (diff) | |
| download | linux-12d319b920fa673a4d5e7c1785c5dc82dcd15257.tar.xz | |
s390/dasd: fix performance drop
Commit ca369d51b ("sd: Fix device-imposed transfer length limits")
introduced a new queue limit max_dev_sectors which limits the maximum
sectors for requests. The default value leads to small dasd requests
and therefor to a performance drop.
Set the max_dev_sectors value to the same value as the max_hw_sectors
to use the maximum available request size for DASD devices.
Signed-off-by: Stefan Haberland <sth@linux.vnet.ibm.com>
Cc: stable@vger.kernel.org # 4.4+
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
Diffstat (limited to 'arch')
0 files changed, 0 insertions, 0 deletions