[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index] Re: [PATCH][4.15] Performance regression due to XSA-336
Jan Beulich writes ("Re: [PATCH][4.15] Performance regression due to XSA-336"): > On 26.03.2021 12:53, Ian Jackson wrote: > > This amounts to a request to consider a release ack for "x86/vpt: > > Replace per-guest pt_migrate lock with per pt lock". > > Or, as already suggested by Roger, perhaps something simpler. First of > all I wanted you to be aware. Thank you, yes. That is very helpful. > > That patch fixes a regression due to XSA-336. XSA-336 affected many > > versions of Xen. Therefore this is not a regression between 4.14 and > > 4.15; rather it's a regresion from pre-XSA-336 to post-XSA-336. > > > > I looked at the patch and I am really not comfortable with that kind > > of change at this stage of the release. > > > > So I'm afraid the answer is no, unless I have misunderstood something. > > Understood. I might consider "something simpler" but the bar is very high by now and it seems unlikely to make the cut. Thanks, Ian.
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