Messages in this thread | | | From | Linus Torvalds <> | Date | Thu, 6 Aug 2020 12:02:40 -0700 | Subject | Re: [GIT PULL] x86/mm changes for v5.9 |
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On Thu, Aug 6, 2020 at 11:57 AM Joerg Roedel <jroedel@suse.de> wrote: > > On Thu, Aug 06, 2020 at 03:10:34PM +0200, Ingo Molnar wrote: > > > > * Linus Torvalds <torvalds@linux-foundation.org> wrote: > > > So apparently the "the page-table pages are all pre-allocated now" is > > > simply not true. Joerg? > > It pre-allocates the whole vmalloc/ioremap PUD/P4D pages, but I actually > only tested it with 4-level paging, as I don't have access to 5-level > paging hardware.
I don't think Jason has either.
The
PGD 0 P4D 0
line tells us that "pgd_present()" is true, even though PGD is 0 (otherwise it wouldn't print the P4D part). That means that he doesn't have l5 enabled.
But you may obviously have different settings for CONFIG_X86_5LEVEL, and maybe that ends up changing something?
But since apparently it's not immediately obvious what the problem is, I'll revert it for now.
Linus
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