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[209.85.219.179]) by smtp.gmail.com with ESMTPSA id j6-20020a37c246000000b006eed47a1a1esm2413668qkm.134.2022.10.25.12.20.56 for (version=TLS1_3 cipher=TLS_AES_128_GCM_SHA256 bits=128/128); Tue, 25 Oct 2022 12:20:56 -0700 (PDT) Received: by mail-yb1-f179.google.com with SMTP id 187so6856106ybe.1 for ; Tue, 25 Oct 2022 12:20:56 -0700 (PDT) X-Received: by 2002:a25:5389:0:b0:6bc:f12c:5d36 with SMTP id h131-20020a255389000000b006bcf12c5d36mr34937084ybb.184.1666725655766; Tue, 25 Oct 2022 12:20:55 -0700 (PDT) MIME-Version: 1.0 References: <6350a5f07bae2_6be12944c@dwillia2-xfh.jf.intel.com.notmuch> <6356f1f74678c_141929415@dwillia2-mobl3.amr.corp.intel.com.notmuch> In-Reply-To: From: Linus Torvalds Date: Tue, 25 Oct 2022 12:20:39 -0700 X-Gmail-Original-Message-ID: Message-ID: Subject: Re: writeback completion soft lockup BUG in folio_wake_bit() To: Matthew Wilcox Cc: Dan Williams , Brian Foster , Linux-MM , linux-fsdevel , linux-xfs , Hugh Dickins , jesus.a.arechiga.lopez@intel.com, tim.c.chen@linux.intel.com Content-Type: text/plain; charset="UTF-8" ARC-Seal: i=1; s=arc-20220608; d=hostedemail.com; t=1666725658; a=rsa-sha256; cv=none; b=l+kDmNheauAmkINbrSiSkTCNksh1ws/NCpyAxgZ/Y62GUW+6CXOldCcixsP7jZDgDoMEeJ C1Qoht6qQQqc8lx4Q6EFXa6TeCHeY/LbDfLzeB3eCw4S7LXLHNN8WBkDewbTwXs9IOJzy0 G/lCmmWFkmFpAjQlmWuezppWGzjY/IU= ARC-Authentication-Results: i=1; imf04.hostedemail.com; dkim=pass header.d=linux-foundation.org header.s=google header.b=gKZF6zvo; spf=pass (imf04.hostedemail.com: domain of torvalds@linuxfoundation.org designates 209.85.219.45 as permitted sender) smtp.mailfrom=torvalds@linuxfoundation.org; dmarc=none ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=hostedemail.com; s=arc-20220608; t=1666725658; 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=XRU4yx13ey+qiqkDAd9/g8Rgj3Vasx9oyOtn3EmTBc8=; b=uGwUrAd0drocZbnWAoqCdA3w1dMlNMdlDGnMLNZYxM7Pp+gQ0bvU+IhQJO4lKhTjdqPWNB 6Nd5POwQ/Syd8vy1BGZrO1VsNwdhG6FjTxMH11ecqx6NVyvGjpkmt1UhHPbnVBc/77s+V0 2+T+ieqepKUDIhjpK9VHSI6R24qI7kk= X-Rspamd-Queue-Id: 1ECD240003 X-Rspam-User: Authentication-Results: imf04.hostedemail.com; dkim=pass header.d=linux-foundation.org header.s=google header.b=gKZF6zvo; spf=pass (imf04.hostedemail.com: domain of torvalds@linuxfoundation.org designates 209.85.219.45 as permitted sender) smtp.mailfrom=torvalds@linuxfoundation.org; dmarc=none X-Rspamd-Server: rspam04 X-Stat-Signature: dmesenofc3xrs91zfeo83aoz3gz3frdx X-HE-Tag: 1666725657-110717 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, Oct 25, 2022 at 12:19 PM Matthew Wilcox wrote: > > I've been carrying a pair of patches in my tree to rip out the wait > bookmarks since March, waiting for me to write a userspace testcase to > reproduce the problem against v4.13 and then check it no longer does so > against v5.0. Unfortunately, that hasn't happened. I'm happy to add > Arechiga's Tested-by, and submit them to Andrew and have him bring them > into v6.2, since this doesn't seem urgent? Ack, sounds good to me. Linus