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From: Borislav Petkov <bp@alien8.de>
To: Ankur Arora <ankur.a.arora@oracle.com>
Cc: Andy Lutomirski <luto@amacapital.net>,
	Andy Lutomirski <luto@kernel.org>,
	LKML <linux-kernel@vger.kernel.org>,
	Linux-MM <linux-mm@kvack.org>,
	"Kirill A. Shutemov" <kirill@shutemov.name>,
	Michal Hocko <mhocko@kernel.org>,
	Boris Ostrovsky <boris.ostrovsky@oracle.com>,
	Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>,
	Thomas Gleixner <tglx@linutronix.de>,
	Ingo Molnar <mingo@redhat.com>, X86 ML <x86@kernel.org>,
	"H. Peter Anvin" <hpa@zytor.com>, Arnd Bergmann <arnd@arndb.de>,
	Andrew Morton <akpm@linux-foundation.org>,
	Ira Weiny <ira.weiny@intel.com>,
	linux-arch <linux-arch@vger.kernel.org>
Subject: Re: [PATCH 5/8] x86/clear_page: add clear_page_uncached()
Date: Thu, 15 Oct 2020 12:35:35 +0200	[thread overview]
Message-ID: <20201015103535.GC11838@zn.tnic> (raw)
In-Reply-To: <3de58840-1f4c-566b-3a66-46d57475820c@oracle.com>

On Wed, Oct 14, 2020 at 08:37:44PM -0700, Ankur Arora wrote:
> I don't disagree but I think the selection of cached/uncached route should
> be made where we have enough context available to be able to choose to do
> this.
>
> This could be for example, done in mm_populate() or gup where if say the
> extent is larger than LLC-size, it takes the uncached path.

Are there examples where we don't know the size?

-- 
Regards/Gruss,
    Boris.

https://people.kernel.org/tglx/notes-about-netiquette

  reply	other threads:[~2020-10-15 10:35 UTC|newest]

Thread overview: 29+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2020-10-14  8:32 [PATCH 0/8] Use uncached writes while clearing gigantic pages Ankur Arora
2020-10-14  8:32 ` [PATCH 1/8] x86/cpuid: add X86_FEATURE_NT_GOOD Ankur Arora
2020-10-14  8:32 ` [PATCH 2/8] x86/asm: add memset_movnti() Ankur Arora
2020-10-14  8:32 ` [PATCH 3/8] perf bench: " Ankur Arora
2020-10-14  8:32 ` [PATCH 4/8] x86/asm: add clear_page_nt() Ankur Arora
2020-10-14 19:56   ` Borislav Petkov
2020-10-14 21:11     ` Ankur Arora
2020-10-14  8:32 ` [PATCH 5/8] x86/clear_page: add clear_page_uncached() Ankur Arora
2020-10-14 11:10   ` kernel test robot
2020-10-14 13:04   ` kernel test robot
2020-10-14 15:45   ` Andy Lutomirski
2020-10-14 19:58     ` Borislav Petkov
2020-10-14 21:07       ` Andy Lutomirski
2020-10-14 21:12         ` Borislav Petkov
2020-10-15  3:37           ` Ankur Arora
2020-10-15 10:35             ` Borislav Petkov [this message]
2020-10-15 21:20               ` Ankur Arora
2020-10-16 18:21                 ` Borislav Petkov
2020-10-15  3:21         ` Ankur Arora
2020-10-15 10:40           ` Borislav Petkov
2020-10-15 21:40             ` Ankur Arora
2020-10-14 20:54     ` Ankur Arora
2020-10-14  8:32 ` [PATCH 6/8] mm, clear_huge_page: use clear_page_uncached() for gigantic pages Ankur Arora
2020-10-14 15:28   ` Ingo Molnar
2020-10-14 19:15     ` Ankur Arora
2020-10-14  8:32 ` [PATCH 7/8] x86/cpu/intel: enable X86_FEATURE_NT_GOOD on Intel Broadwellx Ankur Arora
2020-10-14 15:31   ` Ingo Molnar
2020-10-14 19:23     ` Ankur Arora
2020-10-14  8:32 ` [PATCH 8/8] x86/cpu/amd: enable X86_FEATURE_NT_GOOD on AMD Zen Ankur Arora

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