linux-kernel - Re: [PATCH 1/1] mm: thp: kvm: fix memory corruption in KVM with THP enabled

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Message-ID: <20160427160317.GC11700@redhat.com>
Date:	Wed, 27 Apr 2016 18:03:17 +0200
From:	Andrea Arcangeli <aarcange@...hat.com>
To:	"Kirill A. Shutemov" <kirill@...temov.name>
Cc:	Andrew Morton <akpm@...ux-foundation.org>,
	linux-kernel@...r.kernel.org, linux-mm@...ck.org,
	qemu-devel@...gnu.org,
	"Dr. David Alan Gilbert" <dgilbert@...hat.com>,
	"Li, Liang Z" <liang.z.li@...el.com>,
	Amit Shah <amit.shah@...hat.com>,
	Paolo Bonzini <pbonzini@...hat.com>
Subject: Re: [PATCH 1/1] mm: thp: kvm: fix memory corruption in KVM with THP
 enabled

On Wed, Apr 27, 2016 at 05:57:30PM +0200, Andrea Arcangeli wrote:
> couldn't do a fix as cleaner as this one for 4.6.

ehm "cleaner then"

If you've suggestions for a better name than PageTransCompoundMap I
can respin a new patch though, I considered "CanMap" but I opted for
the short version.

Also I'm not really sure moving transparent_hugepage_adjust will make
much sense. I mentioned it because Andres in another thread said it
was suggested but the real common code knowledge is about
PageTransCompoundMap only, all sort of !mmu_gfn_lpage_is_disallowed
for dirty logging at 4k shadow granularity is KVM internal.