From: Linus Torvalds <torvalds@linux-foundation.org>
To: Dave Hansen <dave.hansen@intel.com>
Cc: Aaron Lu <aaron.lu@intel.com>,
Linux Memory Management List <linux-mm@kvack.org>,
Andrew Morton <akpm@linux-foundation.org>,
"Kirill A. Shutemov" <kirill.shutemov@linux.intel.com>,
Huang Ying <ying.huang@intel.com>,
Linux Kernel Mailing List <linux-kernel@vger.kernel.org>
Subject: Re: [PATCH 2/2] mremap: use mmu gather logic for tlb flush in mremap
Date: Mon, 28 Nov 2016 09:42:07 -0800 [thread overview]
Message-ID: <CA+55aFy_qBh6iz+vH+6QKyLcboRiu8r2b6KY_gxLBTqeJprgNg@mail.gmail.com> (raw)
In-Reply-To: <31b1393c-22d2-8a49-842c-9678a1921441@intel.com>
On Mon, Nov 28, 2016 at 9:32 AM, Dave Hansen <dave.hansen@intel.com> wrote:
>
> But, both call-sites are still keeping 'force_flush' to store the
> information about whether we ever saw a dirty pte. If we moved _that_
> logic into the x86 mmu_gather code, we could get rid of all the
> 'force_flush' tracking in both call sites. It also makes us a bit more
> future-proof against these page_mkclean() races if we ever grow a third
> site for clearing ptes.
Yeah, that sounds like a nice cleanup and would put all the real state
into that mmu_gather structure.
Linus
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prev parent reply other threads:[~2016-11-28 17:42 UTC|newest]
Thread overview: 14+ messages / expand[flat|nested] mbox.gz Atom feed top
2016-11-10 9:16 [PATCH] mremap: fix race between mremap() and page cleanning Aaron Lu
2016-11-17 7:45 ` Aaron Lu
2016-11-17 17:53 ` Linus Torvalds
2016-11-18 2:48 ` Aaron Lu
2016-11-28 8:37 ` [PATCH 0/2] use mmu gather logic for tlb flush in mremap Aaron Lu
2016-11-28 8:39 ` [PATCH 1/2] tlb: export tlb_flush_mmu_tlbonly Aaron Lu
2016-11-28 8:40 ` [PATCH 2/2] mremap: use mmu gather logic for tlb flush in mremap Aaron Lu
2016-11-28 17:15 ` Linus Torvalds
2016-11-29 2:57 ` [PATCH] mremap: move_ptes: check pte dirty after its removal Aaron Lu
2016-11-29 3:06 ` Linus Torvalds
2016-11-29 3:22 ` Aaron Lu
2016-11-29 5:27 ` [PATCH update] " Aaron Lu
2016-11-28 17:32 ` [PATCH 2/2] mremap: use mmu gather logic for tlb flush in mremap Dave Hansen
2016-11-28 17:42 ` Linus Torvalds [this message]
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