Control: tag -1 upstream moreinfo On Fri, 2017-01-06 at 11:37 +0000, Andy Smith wrote: [...] > In this response: > > https://lists.xen.org/archives/html/xen-devel/2016-12/msg00294.html > > Andrew Cooper suggested trying two patches: > > Can you try these two patches from the XenServer Patch queue? > > https://github.com/xenserver/linux-3.x.pg/blob/master/master/series#L613-L614 > > > > There are bugs with some device drivers in choosing the correct DMA > > mask, which cause them incorrectly to believe that they need > > bounce-buffering. Once you hit bounce buffering, everything grinds > > to a halt. > > Using a kernel built with those patches the problem has gone away for > me and has been stable for about a month of production load. [...] At a first glance these patches look reasonable, but they haven't been applied upstream. Why not? We don't like to add patches that aren't accepted upstream. Ben. -- Ben Hutchings The generation of random numbers is too important to be left to chance. - Robert Coveyou
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