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| author | Li Dongyang <dongyang.li@anu.edu.au> | 2017-11-14 00:48:04 +0100 |
|---|---|---|
| committer | Martin K. Petersen <martin.petersen@oracle.com> | 2017-12-05 04:55:59 +0100 |
| commit | 9c0a50022b8ac7e863e6ec8342fa476fe5d1d75c (patch) | |
| tree | df834c552366b6f80905fe6b93dd70a6ab758340 /drivers/scsi/fnic | |
| parent | scsi: wd719x: make card_types static const, shrinks object size (diff) | |
| download | linux-9c0a50022b8ac7e863e6ec8342fa476fe5d1d75c.tar.xz linux-9c0a50022b8ac7e863e6ec8342fa476fe5d1d75c.zip | |
scsi: ses: don't ask for diagnostic pages repeatedly during probe
We are testing if there is a match with the ses device in a loop by
calling ses_match_to_enclosure(), which will issue scsi receive
diagnostics commands to the ses device for every device on the same
host. On one of our boxes with 840 disks, it takes a long time to load
the driver:
[root@g1b-oss06 ~]# time modprobe ses
real 40m48.247s
user 0m0.001s
sys 0m0.196s
With the patch:
[root@g1b-oss06 ~]# time modprobe ses
real 0m17.915s
user 0m0.008s
sys 0m0.053s
Note that we still need to refresh page 10 when we see a new disk to
create the link.
Signed-off-by: Li Dongyang <dongyang.li@anu.edu.au>
Tested-by: Jason Ozolins <jason.ozolins@hpe.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
Diffstat (limited to 'drivers/scsi/fnic')
0 files changed, 0 insertions, 0 deletions