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X-IronPort-AV: E=McAfee;i="6600,9927,10838"; a="466304324" X-IronPort-AV: E=Sophos;i="6.02,160,1688454000"; d="scan'208";a="466304324" Received: from fmsmga005.fm.intel.com ([10.253.24.32]) by fmsmga105.fm.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 19 Sep 2023 09:11:50 -0700 X-ExtLoop1: 1 X-IronPort-AV: E=McAfee;i="6600,9927,10838"; a="1077043484" X-IronPort-AV: E=Sophos;i="6.02,160,1688454000"; d="scan'208";a="1077043484" Received: from rdromms-mobl4.amr.corp.intel.com (HELO [10.212.158.204]) ([10.212.158.204]) by fmsmga005-auth.fm.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 19 Sep 2023 09:11:50 -0700 Message-ID: Date: Tue, 19 Sep 2023 09:11:49 -0700 MIME-Version: 1.0 User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:102.0) Gecko/20100101 Thunderbird/102.15.1 Subject: Re: [syzbot] [mm?] BUG: Bad page map (7) Content-Language: en-US To: Yin Fengwei , Matthew Wilcox Cc: syzbot , akpm@linux-foundation.org, linux-kernel@vger.kernel.org, linux-mm@kvack.org, syzkaller-bugs@googlegroups.com References: <000000000000d099fa0604f03351@google.com> <0465d13d-83b6-163d-438d-065d03e9ba76@intel.com> <092a9bb2-727e-5849-fa4f-18535b998efc@intel.com> <97e59c09-30c8-038a-a6f9-3d862a0d3ede@intel.com> <381e4ccd-47ee-955b-f7af-fe192bea0cd4@intel.com> From: Dave Hansen In-Reply-To: <381e4ccd-47ee-955b-f7af-fe192bea0cd4@intel.com> Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 7bit X-Stat-Signature: 77zh76bg13jcxm9t1ppuign6imkzgiyt X-Rspamd-Server: rspam10 X-Rspamd-Queue-Id: 9DE73120007 X-Rspam-User: X-HE-Tag: 1695139912-276473 X-HE-Meta: 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 HPjcFze4 g4K0wKR9ZLrEkdEeZUwe1M9/lhcU8YPVvdUETYAcQkedroHS+gahpwl964ilRi73BVd24mBZvnBOwHhVzerHpISfeZTyAgdngF1Igr4Ujl4QRytdJ8JrHMgQr4eke2x9w95gVDI8pfefU8hN6mLYcunROuDLfHsshV7eAQu4hRNwYJFXMH/6gwBS3+d1qBsHv8e17Q+VLjf3UlcI2KH3fk18Gz6d2CrA1LdKZwkiMVW6PlZgjDwGBIgOu9xuijs6FIvENIh5L+V1V7E2Iz/UwJoy/FN62iuwUHykDc+q2bFpkuwCsVplRcGd3jNoiAkXUX/mMgNyoc+l0SsIXt3CCJnJ5RmaiF5DObLk2G8OSyL3dvQ0= 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 9/18/23 18:11, Yin Fengwei wrote: >> I will find a test machine to measure the performance difference of these two >> versions by using xfs + will-it-scale. Will keep you guys updated. > I'd like to move this bug fixing forward. Based on the test result here: > https://lore.kernel.org/linux-mm/124631ab-eb4c-6584-12d4-f3c91e69c873@intel.com/ > There is very small performance delta between your version and Dave's. > > What do you think if we propose to merge Dave's version? Or do I need collect > more data? Thanks. I honestly don't feel that strongly about my version versus Matthew's. I like mine, but I'll happily ack either approach. The thing I care about the most is getting the bug fixed ... quickly. :)