[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index] Re: [Xen-devel] [PATCH] Bug-fixes to enable PV ticketlock to work under Xen PVHVM with Linux v3.12. (v1)
On Mon, Sep 09, 2013 at 11:34:42AM +0100, David Vrabel wrote: > On 07/09/13 14:46, Konrad Rzeszutek Wilk wrote: > > After a bit of false starts, lots of debugging, and tons of help from > > Stefano and > > David on how event mechanism is suppose to work I am happy to present a set > > of bug-fixes that make PV ticketlocks work under Xen PVHVM with Linux v3.12. > > > > v3.12 has now thanks to commit 816434ec4a674fcdb3c2221a6dffdc8f34020550 > > (Merge branch 'x86-spinlocks-for-linus' of > > git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip) > > PV ticketlocks. That means: > > - Xen PV bytelock has been replaced by Xen PV ticketlock. > > - Xen PVHVM is using ticketlock (not PV variant) - this patch makes it PV. > > - baremetal is still using ticketlocks. > > > > In other words everything in the kernel is ticketlock based with the > > virtualizations > > having the 'PV' part to aid. > > > > Please take a look at the patches. If you are interested in testing them > > out I will post a git tree on Monday based on v3.11 and v3.12-rc0. > > > > Note that I had not run any performance tests and I am not sure when I will > > be able to (got other bugs to squash now). I've asked our internal > > performance > > engineer to do some benchmarking - but those results won't be available for > > some time as it takes time to do good benchmarking. > > If there was favourable performance data I would be happy for these to > go in 3.12, without I think they'll have to wait for 3.13. Then they will have to wait. I am not going to be able to provide those within this month. > > David > > _______________________________________________ > Xen-devel mailing list > Xen-devel@xxxxxxxxxxxxx > http://lists.xen.org/xen-devel _______________________________________________ Xen-devel mailing list Xen-devel@xxxxxxxxxxxxx http://lists.xen.org/xen-devel
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