| Message ID | 20230928173205.2826598-1-vdonnefort@google.com (mailing list archive) |
|---|---|
| Headers | show |
| Series | KVM: arm64: Use folio for THP support | expand |
On Thu, 28 Sep 2023 18:32:02 +0100, Vincent Donnefort <vdonnefort@google.com> wrote: > > With the introduction of folios for transparent huge pages [1], we > can rely on this support to identify if a page is backed by a huge one, > saving a page table walk. > > v1 -> v2: > * Add git reference to [1] in the commit message > * GUP always acted on the Head page under the hood. Update the commit > message. > > [1] https://lkml.kernel.org/r/20220504182857.4013401-3-willy@infradead.org > > Vincent Donnefort (2): > KVM: arm64: Do not transfer page refcount for THP adjustment > KVM: arm64: Use folio for THP adjustment > > arch/arm64/kvm/mmu.c | 79 ++------------------------------------------ > 1 file changed, 3 insertions(+), 76 deletions(-) Reviewed-by: Marc Zyngier <maz@kernel.org> M.
On Thu, 28 Sep 2023 18:32:02 +0100, Vincent Donnefort wrote: > With the introduction of folios for transparent huge pages [1], we > can rely on this support to identify if a page is backed by a huge one, > saving a page table walk. > > v1 -> v2: > * Add git reference to [1] in the commit message > * GUP always acted on the Head page under the hood. Update the commit > message. > > [...] Applied to kvmarm/next, thanks! [1/2] KVM: arm64: Do not transfer page refcount for THP adjustment https://git.kernel.org/kvmarm/kvmarm/c/c04bf723ccd6 [2/2] KVM: arm64: Use folio for THP adjustment https://git.kernel.org/kvmarm/kvmarm/c/bf92834e6f6e -- Best, Oliver
On Sat, Sep 30, 2023 at 05:57:31PM +0000, Oliver Upton wrote: > On Thu, 28 Sep 2023 18:32:02 +0100, Vincent Donnefort wrote: > > With the introduction of folios for transparent huge pages [1], we > > can rely on this support to identify if a page is backed by a huge one, > > saving a page table walk. > > > > v1 -> v2: > > * Add git reference to [1] in the commit message > > * GUP always acted on the Head page under the hood. Update the commit > > message. > > > > [...] > > Applied to kvmarm/next, thanks! > > [1/2] KVM: arm64: Do not transfer page refcount for THP adjustment > https://git.kernel.org/kvmarm/kvmarm/c/c04bf723ccd6 > [2/2] KVM: arm64: Use folio for THP adjustment > https://git.kernel.org/kvmarm/kvmarm/c/bf92834e6f6e Based on the discussion I've gone ahead and dropped the second patch. I'm keeping the first since it is a nice cleanup. Thanks Ryan for catching what would've otherwise been a rather nasty bug.
With the introduction of folios for transparent huge pages [1], we can rely on this support to identify if a page is backed by a huge one, saving a page table walk. v1 -> v2: * Add git reference to [1] in the commit message * GUP always acted on the Head page under the hood. Update the commit message. [1] https://lkml.kernel.org/r/20220504182857.4013401-3-willy@infradead.org Vincent Donnefort (2): KVM: arm64: Do not transfer page refcount for THP adjustment KVM: arm64: Use folio for THP adjustment arch/arm64/kvm/mmu.c | 79 ++------------------------------------------ 1 file changed, 3 insertions(+), 76 deletions(-) base-commit: ce9ecca0238b140b88f43859b211c9fdfd8e5b70