Date: Tue, 18 Nov 2008 17:20:43 +0800 From: "Chao Shin" <quakelee@geekcn.org> To: "Pawel Jakub Dawidek" <pjd@freebsd.org>, d@delphij.net Cc: FreeBSD Stable <freebsd-stable@freebsd.org> Subject: Re: ZFS crashes on heavy threaded environment Message-ID: <op.uks5krn2hnq548@qld630> In-Reply-To: <20081117155835.GC2101@garage.freebsd.pl> References: <491CE71F.2020208@delphij.net> <491CE835.4050504@delphij.net> <20081117155835.GC2101@garage.freebsd.pl>
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On Mon, 17 Nov 2008 23:58:35 +0800，Pawel Jakub Dawidek <pjd@freebsd.org> wrote: > On Thu, Nov 13, 2008 at 06:53:41PM -0800, Xin LI wrote: >> -----BEGIN PGP SIGNED MESSAGE----- >> Hash: SHA1 >> >> Xin LI wrote: >> > Hi, Pawel, >> > >> > We can still reproduce the ZFS crash (threading+heavy I/O load) on a >> > fresh 7.1-STABLE build, in a few minutes: >> > >> > /usr/local/bin/iozone -M -e -+u -T -t 128 -S 4096 -L 64 -r 4k -s 30g >> -i >> > 0 -i 1 -i 2 -i 8 -+p 70 -C >> > >> > I have included a backtrace output from my colleague who has his hands >> > on the test environment. Should there is more information necessary >> > please let us know and we wish to provide help on this. >> >> Further datapoint. The system used to run with untuned loader.conf, and >> my colleague just reported that with the following loader.conf, the >> problem can be triggered sooner: >> >> vm.kmem_size_max=838860800 >> vm.kmem_size_scale="2" >> >> The system is running FreeBSD/amd64 7.1-PRERELEASE equipped with 8GB of >> RAM with GENERIC kernel. > > With new ZFS I get: > > Memory allocation failed:: Cannot allocate memory > > Is this expected? > At first, Congratulations to you, thanks to your works, well done! I used this command on a FreeBSD 7.1-PRERELEASE amd64 box with 8GB mem, isn't got output like that, but kernel panic. Maybe you should lower the threads and file size, for example: /usr/local/bin/iozone -M -e -+u -T -t 64 -S 4096 -L 64 -r 4k -s 2g -i 0 -i 1 -i 2 -i 8 -+p 70 -C Actually, we had used this command to test a 8-current with zfs v12 patch on July, there is no more panic. So we hope zfs v13 can MFC as soon as possible, because we really need it now. -- The Power to Serve
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