Red Hat Bugzilla – Bug 216286
Bad performance on Promise raid with 2.6.18 kernel
Last modified: 2013-07-02 22:30:57 EDT
Description of problem:
Using kernel-smp-2.6.18 cause bad performance on SW Promise SATA Raid-1 (on ASUS
P4C800-E Deluxe). This is mostly visible when using apps which access frequently
(=many files?) the raid partition ie. thunderbird (also when writing emails),
KDE (mostly when ending session). The applications hang for a while, the disk
makes big activity (crunch), gui hangs, after ending disk activity everything is
When I boot to kernel-smp-2.6.17 everything works just fine.
Version-Release number of selected component (if applicable):
kernel-smp-2.6.18 (all available updates)
Steps to Reproduce:
2.run application which use the raid partition (in my case is it /home)
big disk activity (disk crunch), gui seizing
low disk activity (no disk crunch), no gui seizing
When I umount the raid partition (/home) and log into my account with /home on
"regular" partition (on another SATA drive) everything works fine, so I think
that this is connected with changes on raid in 2.6.18 kernel
Created attachment 141566 [details]
lspci & raid & partitions
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