Date: Wed, 29 Sep 2010 10:24:50 +0300 From: Andriy Gapon <avg@icyb.net.ua> To: Artem Belevich <fbsdlist@src.cx> Cc: stable@freebsd.org, fs@freebsd.org, Ben Kelly <ben@wanderview.com> Subject: Re: Still getting kmem exhausted panic Message-ID: <4CA2E9C2.3030806@icyb.net.ua> In-Reply-To: <AANLkTi=aZp=46pHn9NtYsKBbMq1JwxPKb1D3o3Wngy1V@mail.gmail.com> References: <4CA1D06C.9050305@digiware.nl> <20100928115047.GA62142__15392.0458550148$1285675457$gmane$org@icarus.home.lan> <4CA1DDE9.8090107@icyb.net.ua> <20100928132355.GA63149@icarus.home.lan> <4CA1EF69.4040402@icyb.net.ua> <FE116FEC-714D-4BF5-86D8-E29BFA713C69@wanderview.com> <4CA21809.7090504@icyb.net.ua> <71D54408-4B97-4F7A-BD83-692D8D23461A@wanderview.com> <4CA22337.2010900@icyb.net.ua> <F244BA6D-3347-4D76-BAFB-D8B975783877@wanderview.com> <4CA25E92.4060904@icyb.net.ua> <5BD33772-C0EA-48A9-BE9A-C8FBAF0008D7@wanderview.com> <4CA26AB4.3050108@icyb.net.ua> <AANLkTi=aZp=46pHn9NtYsKBbMq1JwxPKb1D3o3Wngy1V@mail.gmail.com>
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on 29/09/2010 03:38 Artem Belevich said the following: > On Tue, Sep 28, 2010 at 3:22 PM, Andriy Gapon <avg@icyb.net.ua> wrote: >> BTW, have you seen my posts about UMA and ZFS on hackers@ ? >> I found it advantageous to use UMA for ZFS I/O buffers, but only after reducing >> size of per-CPU caches for the zones with large-sized items. >> I further modified the code in my local tree to completely disable per-CPU >> caches for items > 32KB. > > Do you have updated patch disabling per-cpu caches for large items? > I've just rebuilt FreeBSD-8 with your uma-2.diff (it needed r209050 > from -head to compile) and so far things look good. I'll re-enable UMA > for ZFS and see how it flies in a couple of days. I've just uploaded uma-3.diff. It implements what uma-1.diff did, plus totally skips per-CPU caches for items > 32KB, and also has code from uma-2.diff for flushing per-CPU caches on significant memory shortage. Will appreciate your feedback. Thank you for testing! -- Andriy Gapon
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