CAM disk I/O starvation
gljennjohn at googlemail.com
Wed Apr 11 17:21:59 UTC 2012
On Tue, 3 Apr 2012 14:27:43 -0700
Jerry Toung <jrytoung at gmail.com> wrote:
> On 4/3/12, Gary Jennejohn <gljennjohn at googlemail.com> wrote:
> > It would be interesting to see your patch. I always run HEAD but maybe
> > I could use it as a base for my own mods/tests.
> Here is the patch
Just for the archive my bad disk performance seems to have been fixed in
HEAD by svn commit r234074. Seems that all interrupts were being handled
by a single CPU/core (I have 6), which resulted in abysmal interrupt
handling when mutltiple disks were busy.
Since this commit my disk preformance is back to normal and long lags
are a thing of the past.
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