Date: Sun, 06 Jan 2008 15:27:18 +0100 From: Kris Kennaway <kris@FreeBSD.org> To: Ivan Voras <ivoras@freebsd.org> Cc: freebsd-current@freebsd.org Subject: Re: When will ZFS become stable? Message-ID: <4780E546.9050303@FreeBSD.org> In-Reply-To: <flqmbo$eac$1@ger.gmane.org> References: <fll63b$j1c$1@ger.gmane.org> <20080104163352.GA42835@lor.one-eyed-alien.net> <9bbcef730801040958t36e48c9fjd0fbfabd49b08b97@mail.gmail.com> <200801061051.26817.peter.schuller@infidyne.com> <9bbcef730801060458k4bc9f2d6uc3f097d70e087b68@mail.gmail.com> <4780D289.7020509@FreeBSD.org> <flqmbo$eac$1@ger.gmane.org>
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Ivan Voras wrote: > Kris Kennaway wrote: > >> kmem problems are just tuning. They are not indicative of stability >> problems in ZFS. > > I disagree - anything that causes a panic is a stability problem. Panics > persist AFTER the tunings (for i386 certainly, and there are unsolved > reports about it on amd64 also) and are present even when driving kmem > size to the maximum. The tunings *can not solve the problems* currently, > they can only delay the time until they appear, which, by Murphy, often > means "sometime around midnight at Saturday". That's an assertion directly contradicted by my experience running a heavily loaded 8-core i386 package builder. Please explain in detail the steps you have taken to tune your kernel. Do you have the vm_kern.c patch applied? > See also the possibility > of deadlocks in the ZIL, reported by some users. Yes, this is an outstanding issue. There are a couple of others I run into in the above configuration, but kmem panics aren't among them. >> Please report any further non-kmem panics you experience. > > I did, once to Pawel and once to the lists. Pawel couldn't help me and > nobody responded on the lists. Can you perform a MySQL read-write > benchmark on one of the 8-core machines with database on ZFS for about > an hour without pause? On a machine with 2 GB (or less) of RAM, > preferrably? I've seen problems on i386 but maybe they are also present > on amd64. I am not set up to test this right now. Kris
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