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Shutemov" Cc: Andy Lutomirski , Sean Christopherson , Andrew Morton , Joerg Roedel , Ard Biesheuvel , Andi Kleen , Kuppuswamy Sathyanarayanan , David Rientjes , Vlastimil Babka , Tom Lendacky , Thomas Gleixner , Peter Zijlstra , Paolo Bonzini , Ingo Molnar , Varad Gautam , Dario Faggioli , Dave Hansen , Mike Rapoport , David Hildenbrand , marcelo.cerri@canonical.com, tim.gardner@canonical.com, khalid.elmously@canonical.com, philip.cox@canonical.com, x86@kernel.org, linux-mm@kvack.org, linux-coco@lists.linux.dev, linux-efi@vger.kernel.org, linux-kernel@vger.kernel.org, Mike Rapoport Subject: Re: [PATCHv7 02/14] mm: Add support for unaccepted memory Message-ID: References: <20220614120231.48165-1-kirill.shutemov@linux.intel.com> <20220614120231.48165-3-kirill.shutemov@linux.intel.com> MIME-Version: 1.0 Content-Type: text/plain; charset=utf-8 Content-Disposition: inline In-Reply-To: <20220614120231.48165-3-kirill.shutemov@linux.intel.com> ARC-Seal: i=1; s=arc-20220608; d=hostedemail.com; t=1658416628; a=rsa-sha256; cv=none; b=dAN7Jy+0owB+FzBzPV0d+rv7Aicc7Xd3tk1KOBlMJUNPNKvsUUP0m10nory4yZWRt32zmO skeRliJ5fUilF5lRxVXoF6rVh7z+7Ivid0nzb17eKKwJfNrytBXmj2TTLzAkhKr3E29Sl9 MT8wyuLb5Exy0b/8Kk1vDojnjkZalbs= ARC-Authentication-Results: i=1; imf31.hostedemail.com; dkim=temperror ("DNS error when getting key") header.d=alien8.de header.s=dkim header.b=K7kfxrWu; dmarc=temperror reason="SPF/DKIM temp error" header.from=alien8.de (policy=temperror); spf=temperror (imf31.hostedemail.com: error in processing during lookup of bp@alien8.de: DNS error) smtp.mailfrom=bp@alien8.de ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=hostedemail.com; s=arc-20220608; t=1658416628; h=from:from:sender:reply-to:subject:subject:date:date: message-id:message-id:to:to:cc:cc:mime-version:mime-version: content-type:content-type:content-transfer-encoding: in-reply-to:in-reply-to:references:references:dkim-signature; bh=VujwBJ+JIPJnYoUR7215p3aIpRsRtO7XiolEV/87d1g=; b=5eqkjkh0hWY5ZNFFzzWmBFPrGG3AlP2JjjAJUFMpga/rM+1ehcLj8U1ZSTrMTNZ6S2vb6g +2kAVNpr2nkieMjn47C4Aim4AYb1e8/qwVJSkvkWrnr02QavcIlEI61Zq2ZXllmD6AHIg9 FHemAkXq7GR+DcIDKjTqqxh3GzqDmmE= X-Rspam-User: X-Rspamd-Server: rspam05 X-Rspamd-Queue-Id: 8689120084 X-Stat-Signature: ezxzt88ake4reii673ym79d6k5u137mg Authentication-Results: imf31.hostedemail.com; dkim=temperror ("DNS error when getting key") header.d=alien8.de header.s=dkim header.b=K7kfxrWu; dmarc=temperror reason="SPF/DKIM temp error" header.from=alien8.de (policy=temperror); spf=temperror (imf31.hostedemail.com: error in processing during lookup of bp@alien8.de: DNS error) smtp.mailfrom=bp@alien8.de X-HE-Tag: 1658416622-355236 X-Bogosity: Ham, tests=bogofilter, spamicity=0.000000, version=1.2.4 Sender: owner-linux-mm@kvack.org Precedence: bulk X-Loop: owner-majordomo@kvack.org List-ID: On Tue, Jun 14, 2022 at 03:02:19PM +0300, Kirill A. Shutemov wrote: > On-demand memory accept means latency spikes every time kernel steps > onto a new memory block. The spikes will go away once workload data > set size gets stabilized or all memory gets accepted. What does that mean? If we're accepting 2M pages and considering referential locality, how are those "spikes" even noticeable? -- Regards/Gruss, Boris. https://people.kernel.org/tglx/notes-about-netiquette