Messages in this thread | | | From | KOSAKI Motohiro <> | Subject | Re: [PATCH -mm] vmscan: protect a fraction of file backed mapped pages from reclaim | Date | Fri, 15 May 2009 08:28:02 +0900 (JST) |
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> On Wed, 13 May 2009, KOSAKI Motohiro wrote: > > > > All these expiration modifications do not take into account that a desktop > > > may sit idle for hours while some other things run in the background (like > > > backups at night or updatedb and other maintenance things). This still > > > means that the desktop will be usuable in the morning. > > > > Have you seen this phenomenom? > > I always use linux desktop for development. but I haven't seen it. > > perhaps I have no luck. I really want to know reproduce way. > > > > Please let me know reproduce way. > > Run a backup (or rsync) over a few hundred GB.
-ENOTREPRODUCED
umm. May I ask detail operation?
> > > The percentage of file backed pages protected is set via > > > /proc/sys/vm/file_mapped_ratio. This defaults to 20%. > > > > Why do you think typical mapped ratio is less than 20% on desktop machine? > > Observation of the typical mapped size of Firefox under KDE.
My point is, desktop people have very various mapped ratio. Do you oppose this?
> > key point is access-once vs access-many. > > Nothing against it if it works. >
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