Date: Sun, 09 Sep 2007 13:12:30 +0200 From: Kris Kennaway <kris@FreeBSD.org> To: Peter Schuller <peter.schuller@infidyne.com> Cc: Simun Mikecin <numisemis@yahoo.com>, freebsd-fs@freebsd.org, freebsd-current@freebsd.org Subject: Re: Swapping on ZFS - stability issue Message-ID: <46E3D51E.3020504@FreeBSD.org> In-Reply-To: <20070909100041.GA60318@hyperion.scode.org> References: <855622.76488.qm@web36601.mail.mud.yahoo.com> <20070908215102.GA8291@hyperion.scode.org> <46E3519E.3040001@FreeBSD.org> <20070909100041.GA60318@hyperion.scode.org>
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Peter Schuller wrote: > [kris] >> Please follow the directions in the developers handbook chapter on kernel >> debugging to obtain the relevant debugging information. > > Apologies. Aside from the first instance, where the machine had sat > there for 12+ hours, I never got any panic message or anything like > that which gives an opportunity for a stacktrace, etc. Doesn't matter, you can debug deadlocks too :) > [pjd] >> This is a known issue also in OpenSolaris. ZFS needs to allocate memory >> to send I/O request, and when there is no memory, it can't allocate it >> thus can't swap a process out and free it. > > Ok, so a known issue. Unless someone tells me otherwise I'll update > the ZFS-on-FreeBSD Wiki pages to warn about this issue (assuming it's > editable by me). Thanks. Kris
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