Messages in this thread | | | Date | Wed, 21 Jun 2006 00:10:55 -0400 | From | Mark Lord <> | Subject | Re: [PATCH] Page writeback broken after resume: wb_timer lost |
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Andrew Morton wrote: > On Tue, 20 Jun 2006 23:38:57 -0400 > Mark Lord <lkml@rtr.ca> wrote: > >>> I just gave it a try here. With or without a suspend/resume cycle after >>> boot, >>> the "sync" time is much quicker. But the Dirty count in /proc/meminfo >>> still shows very huge (eg. 600MB) values that never really get smaller >>> until I type "sync". But that subsequent "sync" only takes a couple >>> of seconds now, rather than 10-20 seconds like before. >> .. >> >> Yup, behaviour is *definitely* much better now. I'm not sure why >> the /proc/meminfo "Dirty" count lags behind reality, but the disk >> is being kept much more up-to-date than without this patch. > > Are you able to come up with a foolproof set of steps which would allow the > laggy-dirtiness to be reproduced by yours truly?
Heh.. don't I wish!
The best is still as described originally:
http://lkml.org/lkml/2006/2/6/170
Basically, "cat" a ton of huge files together into a single new one, and then watch /proc/meminfo to see what happens. For me, the count there still just hangs at some big number like 500MB until I type "sync", at which point it (nearly) instantly now goes to zero.
Previous to this patch, the "sync" actually resulted in a ton of disk writes, but now those happen on the tail end of the "cat" command, as they should.
My kernel .config is available from http://rtr.ca/dell_i9300/kernel/latest/
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