Re: question wrt context switching during disk i/o

From: Mark Hahn (hahn@coffee.psychology.mcmaster.ca)
Date: Fri Oct 20 2000 - 21:50:36 EST


> This is something that has been bugging me for a while. I notice
> on my system that during disk write we do much context switching,
> but not during disk read. Why is that?

bdflush is broken in current kernels. I posted to linux-mm about this,
but Rik et al haven't shown any interest. I normally see bursts of
up to around 40K cs/second when doing writes; I hacked a little
premption counter into the kernel and verified that they're practially
all bdflush...

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