Date: Wed, 17 Nov 2010 17:26:15 +1100 From: Lawrence Stewart <lstewart@freebsd.org> To: freebsd-current@freebsd.org Subject: Re: [HEADS UP] Significant TCP work committed to head - VIMAGE users Message-ID: <4CE37587.6020705@freebsd.org> In-Reply-To: <4CDD0A71.7020708@freebsd.org> References: <4CDD0A71.7020708@freebsd.org>
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On 11/12/10 20:35, Lawrence Stewart wrote: > Hi All, > > A quick note that this evening, I made the first in a series of upcoming > commits to head that modify the TCP stack fairly significantly. I have > no reason to believe you'll notice any issues, but TCP is a complex > beast and it's possible things might crop up. The changes are mostly > related to congestion control, so the sorts of issues that are likely to > crop up if any will most probably be subtle and difficult to even > detect. The first svn revision in question is r215166. The next few > commits I plan to make will be basically zero impact and then another > significant patch will follow in a few weeks. > > If you bump into an issue that you think might be related to this work, > please roll back r215166 from your tree and attempt to reporoduce before > reporting the problem. Please CC me directly with your problem report > and post to freebsd-current@ or freebsd-net@ as well. > > Lots more information about what all this does and how to use it will be > following in the coming weeks, but in the meantime, just keep this note > in the back of your mind. For the curious, some information about the > project is available at [1,2]. > > Cheers, > Lawrence > > [1] http://caia.swin.edu.au/freebsd/5cc/ > [2] > http://www.freebsd.org/news/status/report-2010-07-2010-09.html#Five-New-TCP-Congestion-Control-Algorithms-for-FreeBSD For any VIMAGE users running head, please note that r215166 overlooked some important VIMAGE related issues and actually triggers a kernel panic when the first vnet is brought up (see [3] for details). Please ensure you update to r215395 or later to ensure you have all the patches I committed to address the VIMAGE deficiencies in the original r215166 commit. Cheers, Lawrence [3] http://lists.freebsd.org/pipermail/svn-src-head/2010-November/022381.html
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