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imf10.hostedemail.com; dkim=none; dmarc=none; spf=pass (imf10.hostedemail.com: domain of hdanton@sina.com designates 202.108.3.25 as permitted sender) smtp.mailfrom=hdanton@sina.com ARC-Seal: i=1; s=arc-20220608; d=hostedemail.com; t=1674274898; a=rsa-sha256; cv=none; b=jm8KvLKWuBbykygD43wY4R4WxEJME8IpUVeh9b4S6N7x/VzMdv8CGV30n1W7MQyNJxy9Ap RjWc+HqCg2T1FGtgwdneb3Taf4HCnMbgjTrVAVZL5Sqkh6RVly1dEvbhMK5+2n7MFk8Owt GIwfJ9clRhW79dlLsw1WC1+N4fEdMEU= Received: from unknown (HELO localhost.localdomain)([114.249.61.130]) by sina.com (172.16.97.23) with ESMTP id 63CB677A0000B504; Sat, 21 Jan 2023 12:18:04 +0800 (CST) X-Sender: hdanton@sina.com X-Auth-ID: hdanton@sina.com X-SMAIL-MID: 32424554922395 From: Hillf Danton To: Byungchul Park Cc: linux-kernel@vger.kernel.org, linux-mm@kvack.org, torvalds@linux-foundation.org, longman@redhat.com, penguin-kernel@I-love.SAKURA.ne.jp, max.byungchul.park@gmail.com Subject: Re: [PATCH RFC v7 08/23] dept: Apply sdt_might_sleep_strong() to PG_{locked,writeback} wait Date: Sat, 21 Jan 2023 12:21:05 +0800 Message-Id: <20230121042105.4014-1-hdanton@sina.com> In-Reply-To: <1674272109-21876-1-git-send-email-byungchul.park@lge.com> References: <1674092314-16409-1-git-send-email-byungchul.park@lge.com> MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-Rspamd-Server: rspam05 X-Rspamd-Queue-Id: C0AD7C0013 X-Stat-Signature: c6abwgscxy64t6m6d5zaqiobs5p77mop X-Rspam-User: X-HE-Tag: 1674274893-946183 X-HE-Meta: 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 +2Jb/U0G 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 X-Bogosity: Ham, tests=bogofilter, spamicity=0.276365, version=1.2.4 Sender: owner-linux-mm@kvack.org Precedence: bulk X-Loop: owner-majordomo@kvack.org List-ID: On Sat, 21 Jan 2023 12:35:09 +0900 Byungchul Park > > Can we talk about the DEPT report for the hang issue in here? > > https://lore.kernel.org/lkml/1673235231-30302-1-git-send-email-byungchul.park@lge.com/T/#m458f4d5f3da06a28c7fbb39b392d05e4c016603b Yeah I am all ears after seeing your post. [ 227.857551] context A [ 227.857803] [S] lock(&ni->ni_lock:0) [ 227.858175] [W] folio_wait_bit_common(PG_locked_map:0) [ 227.858658] [E] unlock(&ni->ni_lock:0) [ 227.859233] context B [ 227.859484] [S] (unknown)(PG_locked_map:0) [ 227.859906] [W] lock(&ni->ni_lock:0) [ 227.860277] [E] folio_unlock(PG_locked_map:0)