Messages in this thread | | | Date | Fri, 7 Mar 2008 09:48:19 +0100 | From | Jens Axboe <> | Subject | Re: Linux 2.6.25-rc4 |
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On Thu, Mar 06 2008, Anders Eriksson wrote: > > jens.axboe@oracle.com said: > >> I was a bit unclear on this, the problem is easily reproducible but _only_ > >> on Anders' system (I couldn't reproduce it with smartd here either). > > > What IO scheduler is Anders using (and does it have an impact, eg does it > > hang with deadline as well)? > > CONFIG_IOSCHED_NOOP=y > CONFIG_IOSCHED_AS=y > CONFIG_IOSCHED_DEADLINE=y > CONFIG_IOSCHED_CFQ=y > CONFIG_DEFAULT_IOSCHED="cfq" > > On request here's a sysrq-t from smartd on -rc3, you also see exactly where > smartd gives up (using the gentoo default smasrtd.conf).
Can you try with noop or deadline as the default, to see if it reproduces with them?
> Might a strace of smartd help?
Nope, looking at the trace it'll be stuck waiting for the ioctl to finish.
-- Jens Axboe
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