Date: Tue, 24 Aug 2010 23:33:19 +0300 From: Andriy Gapon <avg@icyb.net.ua> To: Peter Jeremy <peterjeremy@acm.org> Cc: freebsd-fs@freebsd.org Subject: Re: zfs arc - just take it all and be good to me Message-ID: <4C742C8F.2030401@icyb.net.ua> In-Reply-To: <20100824200527.GC11990@server.vk2pj.dyndns.org> References: <20100810214418.GA28288@tolstoy.tols.org> <20100811014919.GA52992@icarus.home.lan> <20100811192537.GA44635@tolstoy.tols.org> <AANLkTin-YvEzoN-ThwwDAqn2mWFMD4-7BnP8N95EqTk0@mail.gmail.com> <20100811214302.GB44635@tolstoy.tols.org> <20100812205625.GA79515@server.vk2pj.dyndns.org> <20100824150035.GB99477@roberto-al.eurocontrol.fr> <20100824200527.GC11990@server.vk2pj.dyndns.org>
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on 24/08/2010 23:05 Peter Jeremy said the following: > On 2010-Aug-24 17:00:36 +0200, Ollivier Robert <roberto@keltia.freenix.fr> wrote: >> According to Peter Jeremy: >>> I suspect Artem is referring to his patch at http://pastebin.com/ZCkzkWcs >>> which I have tweaked somewhat (see the last patch in >>> http://www.freebsd.org/cgi/query-pr.cgi?pr=146410 ). >> >> Thanks, cou you please send it in a non-QP-encoded form please? > > See attached. >>> Whilst these patches _are_ hacks, they seem to do a good job of >>> making ZFS and UFS play together. >> >> Is the patch only useful in these mixed situations or could it be also interestng for those of use running full-zfs (cf. http://www.keltia.net/howtos/zfsboot)? > > I think it will be useful. As well as the trivial fix to count > "cache" as "free" space (which is now in -stable), the intent of the > patch is to improve the ability of ZFS to apply pressure to the VM > subsystem. In theory, this should improve overall system performance > even in a ZFS-only environment where there is memory pressure due to > large, long-running processes Peter, Ollivier, would it be possible for you to test patch informally specified in the following post? http://thread.gmane.org/gmane.os.freebsd.devel.hackers/40788 -- Andriy Gapon
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