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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/ Cheers - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/ | ||||||||||
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