Messages in this thread | | | From | Andy Lutomirski <> | Date | Tue, 22 Sep 2015 11:03:25 -0700 | Subject | Re: [PATCH 01/11] x86/mm/pat: Don't free PGD entries on memory unmap |
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On Tue, Sep 22, 2015 at 10:41 AM, Linus Torvalds <torvalds@linux-foundation.org> wrote: > On Mon, Sep 21, 2015 at 11:23 PM, Ingo Molnar <mingo@kernel.org> wrote: >> >> This complicates PGD management, so don't do this. We can keep the >> PGD mapped and the PUD table all clear - it's only a single 4K page >> per 512 GB of memory mapped. > > I'm ok with this just from a "it removes code" standpoint. That said, > some of the other patches here make me go "hmm". I'll answer them > separately. >
If we want to get rid of vmalloc faults, then this patch makes it much more obvious that it can be done without hurting performance.
> Linus
-- Andy Lutomirski AMA Capital Management, LLC
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