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Wed, 22 Jun 2022 23:31:01 -0700 (PDT) Date: Thu, 23 Jun 2022 14:30:55 +0800 From: Muchun Song To: Miaohe Lin Cc: akpm@linux-foundation.org, shy828301@gmail.com, willy@infradead.org, zokeefe@google.com, linux-mm@kvack.org, linux-kernel@vger.kernel.org Subject: Re: [PATCH 01/16] mm/huge_memory: use flush_pmd_tlb_range in move_huge_pmd Message-ID: References: <20220622170627.19786-1-linmiaohe@huawei.com> <20220622170627.19786-2-linmiaohe@huawei.com> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20220622170627.19786-2-linmiaohe@huawei.com> ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=hostedemail.com; s=arc-20220608; t=1655965863; 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=K+lnUFVfXstPnVYy+cjV15iaq6D3ffH6+7K4e6MODC8=; b=yzmAk/QgukDD4sBGmUvyQTv7md30wBydOaUxn9I3uY+85rUkQgi7zX/qs/1F50BoIYbVBe ld7RCtWow79dJuwIzXBEBfKvmbMDhfDsUbkMAWwmTwYyFjeDMifL7tEkAWBA822hkrYRTR M5vzPVuKSb2wOoYxmSTDc2GbBYIqURM= ARC-Seal: i=1; s=arc-20220608; d=hostedemail.com; t=1655965863; a=rsa-sha256; cv=none; b=kIRuVSqCzcaSX6wqD7Ifqzq4X8OUq8JT3JXJt2MIPbIU4TtmUOWwvjqTumSdlnp4imAfFi 510kqFWyZqc85RYtp7g4honS9pWvfNluags8ti9y1MhQ59vmx1UOkl6Q4S1DghAtn/4ar6 C8SMY+70L6GMaubvHxijG370PKBkxWg= ARC-Authentication-Results: i=1; imf21.hostedemail.com; dkim=pass header.d=bytedance-com.20210112.gappssmtp.com header.s=20210112 header.b="LgiT/zOS"; dmarc=pass (policy=none) header.from=bytedance.com; spf=pass (imf21.hostedemail.com: domain of songmuchun@bytedance.com designates 209.85.216.47 as permitted sender) smtp.mailfrom=songmuchun@bytedance.com X-Stat-Signature: 9wszmahuac1gcin8fx8w7epd433nob37 X-Rspamd-Queue-Id: 9162C1C0002 Authentication-Results: imf21.hostedemail.com; dkim=pass header.d=bytedance-com.20210112.gappssmtp.com header.s=20210112 header.b="LgiT/zOS"; dmarc=pass (policy=none) header.from=bytedance.com; spf=pass (imf21.hostedemail.com: domain of songmuchun@bytedance.com designates 209.85.216.47 as permitted sender) smtp.mailfrom=songmuchun@bytedance.com X-Rspamd-Server: rspam02 X-Rspam-User: X-HE-Tag: 1655965862-175390 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 Thu, Jun 23, 2022 at 01:06:12AM +0800, Miaohe Lin wrote: > ARCHes with special requirements for evicting THP backing TLB entries can > implement flush_pmd_tlb_range. Otherwise also, it can help optimize TLB > flush in THP regime. Using flush_pmd_tlb_range to take advantage of this > in move_huge_pmd. > > Signed-off-by: Miaohe Lin LGTM. Reviewed-by: Muchun Song