Date: Fri, 05 Jan 2007 15:11:07 -0800 From: Julian Elischer <julian@elischer.org> To: Luigi Rizzo <rizzo@icir.org> Cc: lulf@stud.ntnu.no, freebsd-current@freebsd.org, Paul Allen <nospam@nospam.com>, Ivan Voras <ivoras@fer.hr>, freebsd-geom@freebsd.org Subject: Re: Pluggable Disk Schedulers in GEOM Message-ID: <459EDB0B.1050804@elischer.org> In-Reply-To: <20070105145915.B94175@xorpc.icir.org> References: <20070105123127.gnk0v58p44488g48@webmail.ntnu.no> <4085.1167997049@critter.freebsd.dk> <enlelj$63g$1@sea.gmane.org> <20070105184621.dh8kgoy7ko4gk4gc@webmail.ntnu.no> <20070105102905.A91349@xorpc.icir.org> <20070105212543.GA8574@heave.ugcs.caltech.edu> <20070105145915.B94175@xorpc.icir.org>
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Luigi Rizzo wrote: > On Fri, Jan 05, 2007 at 01:25:43PM -0800, Paul Allen wrote: orant of I/O that > > this was also on 4.11 which probably does not use softupdates. yes it does.. Doesn't have UFS2 and snapshots however. > > that does not mean that a scheduler is useless in general. > in fact, what i find questionable is hardwiring unnecessary > (in the sense that they are done only for performance reasons) > ordering constraints in the layers above. I cannot comment for > the disk, but e.g. for the process scheduler there are priority > updates in many places depending on what the process is doing. > > cheers > luigi > _______________________________________________ > freebsd-current@freebsd.org mailing list > http://lists.freebsd.org/mailman/listinfo/freebsd-current > To unsubscribe, send any mail to "freebsd-current-unsubscribe@freebsd.org"
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