Date: Fri, 30 Dec 2011 11:48:28 -0800 From: Maxim Sobolev <sobomax@FreeBSD.org> To: "Robert N. M. Watson" <rwatson@FreeBSD.org> Cc: freebsd-net@freebsd.org, "Bjoern A. Zeeb" <bz@FreeBSD.ORG>, Jack Vogel <jfvogel@gmail.com> Subject: Re: Panic in the udp_input() under heavy load Message-ID: <4EFE158C.2040705@FreeBSD.org> In-Reply-To: <F63603B1-7B35-4ECE-82E6-835CD91B93F8@FreeBSD.org> References: <4EB804D2.2090101@FreeBSD.org> <alpine.BSF.2.00.1111071818250.4603@ai.fobar.qr> <4EB86276.6080801@sippysoft.com> <4EB86866.9060102@sippysoft.com> <alpine.BSF.2.00.1111072324340.4603@ai.fobar.qr> <4EB86FCF.3050306@FreeBSD.org> <alpine.BSF.2.00.1111080239500.1358@fledge.watson.org> <4ECEE6F0.4010301@FreeBSD.org> <F63603B1-7B35-4ECE-82E6-835CD91B93F8@FreeBSD.org>
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On 11/24/2011 11:24 PM, Robert N. M. Watson wrote: >>> There was recently a commit to fix a race condition in 10-CURRENT which >>> >> I think is not slated to be merged for 9.0. You might check the commit >>> >> logs there and see if that fixes the problems you have -- if so, we >>> >> might want to reconsider the plan not to merge for 9.0. >>> >> >>> >> (It relates to a race condition on closing sockets..) >> > >> > Thank you for the tip. I will give it a try and see what happens. So far, after installing that trap we have not seen any panics yet. I have not checked logs yet if my trap actually has catch anything or not. > Do we know if this fix has been merged to stable/9 and releng/9.0? Given multiple reports of instability without it, I think we would be well-served to merge it at this point. Hey Robert, sorry to bother you again, but can you at least point me towards specific SVN revisions that I need to get merged? I tried to google it and also browsed my svn history for the last 4 months using keyword "sockets", but nothing came up. This fix is critical for any system that does lot of fault-ctitical networking, and FreeBSD has always been solid in this regard. It saved us at least 10-15 crashes across 5 machines in the last month. Thanks! -Maxim
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