From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from kanga.kvack.org (kanga.kvack.org [205.233.56.17]) by smtp.lore.kernel.org (Postfix) with ESMTP id 4875CC433EF for ; Tue, 11 Jan 2022 01:58:35 +0000 (UTC) Received: by kanga.kvack.org (Postfix) id D538C6B0072; Mon, 10 Jan 2022 20:58:34 -0500 (EST) Received: by kanga.kvack.org (Postfix, from userid 40) id D02C76B0073; Mon, 10 Jan 2022 20:58:34 -0500 (EST) X-Delivered-To: int-list-linux-mm@kvack.org Received: by kanga.kvack.org (Postfix, from userid 63042) id BCB126B0074; Mon, 10 Jan 2022 20:58:34 -0500 (EST) X-Delivered-To: linux-mm@kvack.org Received: from forelay.hostedemail.com (smtprelay0084.hostedemail.com [216.40.44.84]) by kanga.kvack.org (Postfix) with ESMTP id B099A6B0072 for ; Mon, 10 Jan 2022 20:58:34 -0500 (EST) Received: from smtpin14.hostedemail.com (10.5.19.251.rfc1918.com [10.5.19.251]) by forelay04.hostedemail.com (Postfix) with ESMTP id 76807918BA for ; Tue, 11 Jan 2022 01:58:34 +0000 (UTC) X-FDA: 79016346948.14.C7C50D7 Received: from out1.migadu.com (out1.migadu.com [91.121.223.63]) by imf05.hostedemail.com (Postfix) with ESMTP id E127B100009 for ; Tue, 11 Jan 2022 01:58:33 +0000 (UTC) Date: Tue, 11 Jan 2022 10:58:22 +0900 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=linux.dev; s=key1; t=1641866312; h=from:from:reply-to:subject:subject:date:date:message-id:message-id: to:to:cc:cc:mime-version:mime-version:content-type:content-type: in-reply-to:in-reply-to:references:references; bh=lxxG13wyPIMXULYyBbekKKV3B1n8TjRlsPkH4qCA72U=; b=T0uLAOXcFwUtewOpdyO5C8NHgAn1Nuz/dkaylacNrUuuba6X4nAGd/8KyQVj3uMvKzC0PQ h4Or2N18Sm4RXXSPo/h80YLMp5mURBpbW6kOIV237xxrDThrXig8XMHyuHvaBgQSwLtbke 02oaqu8/NxPq+ZD1isk2x5+pcpQi36M= X-Report-Abuse: Please report any abuse attempt to abuse@migadu.com and include these headers. From: Naoya Horiguchi To: Anshuman Khandual Cc: linux-mm@kvack.org, Steven Rostedt , Ingo Molnar , Andrew Morton , Zi Yan , Naoya Horiguchi , John Hubbard , Matthew Wilcox , linux-kernel@vger.kernel.org Subject: Re: [PATCH] mm/migration: Add trace events for THP migrations Message-ID: <20220111015822.GA799985@u2004> References: <1641531575-28524-1-git-send-email-anshuman.khandual@arm.com> MIME-Version: 1.0 Content-Type: text/plain; charset=utf-8 Content-Disposition: inline In-Reply-To: <1641531575-28524-1-git-send-email-anshuman.khandual@arm.com> X-Migadu-Flow: FLOW_OUT X-Migadu-Auth-User: linux.dev Authentication-Results: imf05.hostedemail.com; dkim=pass header.d=linux.dev header.s=key1 header.b=T0uLAOXc; dmarc=pass (policy=none) header.from=linux.dev; spf=pass (imf05.hostedemail.com: domain of naoya.horiguchi@linux.dev designates 91.121.223.63 as permitted sender) smtp.mailfrom=naoya.horiguchi@linux.dev X-Stat-Signature: ukdknk1z8anfmy9qxi1oiuabjcdmpkaw X-Rspamd-Queue-Id: E127B100009 X-Rspamd-Server: rspam12 X-HE-Tag: 1641866313-123672 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: Hi Anshuman, On Fri, Jan 07, 2022 at 10:29:35AM +0530, Anshuman Khandual wrote: > This adds two trace events for PMD based THP migration without split. These > events closely follow the implementation details like setting and removing > of PMD migration entries, which are essential operations for THP migration. I often want to check which individual pages are migrated to which places (or not migrated) for testing, so these new tracepoints could help me. Maybe these can be much greater if they can handle other types of page migration for raw pages and hugetlb pages. Is it hard to cover all such page migration events? Thanks, Naoya Horiguchi