Messages in this thread | | | Date | Tue, 20 Jun 2006 21:19:05 -0700 | From | Andrew Morton <> | Subject | Re: [PATCH] Page writeback broken after resume: wb_timer lost |
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On Wed, 21 Jun 2006 00:10:55 -0400 Mark Lord <lkml@rtr.ca> wrote:
> 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/
Is that after a suspend/resume, or does it happen after a reboot?
Are you sure all the dirty memory doesn't get autocleaned after 30-60 seconds?
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