Date: Thu, 29 Apr 2010 11:25:08 +0400 From: c0re <nr1c0re@gmail.com> To: freebsd-stable@freebsd.org Subject: Re: FreeBSD 7.3, reboot after panic: double fault Message-ID: <m2u44d4913e1004290025n6d743f2ao8ffc7a9afe84e003@mail.gmail.com> In-Reply-To: <n2i44d4913e1004280511k59ffd686vb27f0bd9cbcc2296@mail.gmail.com> References: <n2g44d4913e1004192353o89dd3437ue9a01c8d5e6b6de5@mail.gmail.com> <201004200748.09566.jhb@freebsd.org> <r2oa31046fc1004200651mc8161796x355afcee15bf9580@mail.gmail.com> <20100421074959.J40281@maildrop.int.zabbadoz.net> <i2j44d4913e1004230721s41b115afz44603ea8a80cce20@mail.gmail.com> <n2i44d4913e1004280511k59ffd686vb27f0bd9cbcc2296@mail.gmail.com>
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And some more workaround: On 7.2 ifconfig mtu em0: flags=8843<UP,BROADCAST,RUNNING,SIMPLEX,MULTICAST> metric 0 mtu 1500 gif0: flags=8051<UP,POINTOPOINT,RUNNING,MULTICAST> metric 0 mtu 1280 Apache running on em0 alias address. >From remote machine trying to download 10Kb file and looking into tcpdump. No kernel panic. But 7.2 dows not respond to GET request, but in apache access log I see that it responds with OK, and there no tcp push packets from 7.2. So file not downloading. But at least no kernel panic :) Then I setup 1200 mtu on em0 and everything is okay, file download successful. On 7.3 same mtu 1500 adn 1280 - kernel panic when trying to download file. When I configure on em0 mtu 1200 - no kernel panic and file download successful. So it looks like mtu discovery related kernel panic. Hope this will help to resolve problem. Cheers.
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