Messages in this thread | | | Date | Fri, 22 Nov 2019 12:42:04 -0800 | From | Fenghua Yu <> | Subject | Re: [PATCH v10 6/6] x86/split_lock: Enable split lock detection by kernel parameter |
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On Fri, Nov 22, 2019 at 09:23:45PM +0100, Peter Zijlstra wrote: > On Fri, Nov 22, 2019 at 06:02:04PM +0000, Luck, Tony wrote: > > > it requires we get the kernel and firmware clean, but only warns about > > > dodgy userspace, which I really don't think there is much of. > > > > > > getting the kernel clean should be pretty simple. > > > > Fenghua has a half dozen additional patches (I think they were > > all posted in previous iterations of the patch) that were found by > > code inspection, rather than by actually hitting them. > > I thought we merged at least some of that, but maybe my recollection is > faulty.
At least 2 key fixes are in TIP tree: https://lore.kernel.org/lkml/157384597983.12247.8995835529288193538.tip-bot2@tip-bot2/ https://lore.kernel.org/lkml/157384597947.12247.7200239597382357556.tip-bot2@tip-bot2/
The two issues are blocking kernel boot when split lock is enabled.
> > > Those should go in ahead of this. > > Yes, we should make the kernel as clean as possible before doing this.
I'll send out other 6 fixes for atomic bitops shortly. These issues are found by code inspection.
Thanks.
-Fenghua
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