Date: Mon, 28 Nov 2011 08:48:28 +0100 From: Martin Matuska <mm@FreeBSD.org> To: Mark Felder <feld@feld.me> Cc: freebsd-fs@freebsd.org, freebsd-current@freebsd.org Subject: Re: zfs i/o hangs on 9-PRERELEASE Message-ID: <4ED33CCC.1050405@FreeBSD.org> In-Reply-To: <820791346f600ea50ff9ebd68e30c059@feld.me> References: <95d00c1b714837aa32e7da72bc4afd03@feld.me> <20111126104840.GA8794@garage.freebsd.pl> <881f876f-6f27-49fd-b6c7-edbe6493ec75@email.android.com> <820791346f600ea50ff9ebd68e30c059@feld.me>
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On 28.11.2011 3:21, Mark Felder wrote: > After many hours of testing, reproducing, and testing again I've > finally been able to narrow down what the real issue is and it's not > ZFS as I suspected. After completely turning off all NFS functionality > and serving my files over Samba I haven't had a single issue. It seems > there is something going on with the new NFS code (I serve out over > v4, but reproduced it last week with v3) and my media player box, a > Popcorn Hour A-200 which is running Linux. If I can cobble some > hardware together and place it between so I can do some tcpdumps I > will provide that data so perhaps someone can understand what's going > on. If this is due to a badly behaving client this is potentially a > DoS on the server. > > > Regards, > > > > Mark Hi Mark, as to the output you have posted this seems to be a pf problem. Could you try the same situation with with pf(4) disabled? If you are not able to reproduce this hang with pf(4) disabled, it would be very nice to have a PR submitted. -- Martin Matuska FreeBSD committer http://blog.vx.sk
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