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 bombadil.infradead.org (bombadil.infradead.org [198.137.202.133]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.lore.kernel.org (Postfix) with ESMTPS id 4710DE7E0D0 for ; Mon, 9 Feb 2026 17:52:13 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=lists.infradead.org; s=bombadil.20210309; h=Sender:List-Subscribe:List-Help :List-Post:List-Archive:List-Unsubscribe:List-Id:Content-Transfer-Encoding: Content-Type:In-Reply-To:From:References:Cc:To:Subject:MIME-Version:Date: Message-ID:Reply-To:Content-ID:Content-Description:Resent-Date:Resent-From: Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID:List-Owner; bh=wWRw45vxPzMf6IUhlILMEm7Zh4ZyPMbWLX+8yExKoms=; b=cbYSfzepWRnbThQz7n1vDzwOe0 5c6zuqvXOmrmR8se+xjVGYYQv1fOVEOrYzNDg/6Q3OEfl+2sw1qwQZAqNAL3nMf+JTNUfxPe84W/1 N4puLpDhd4IxIekA1trmcav1r4f5aZtp1ABsK47GHQ7l3nSc2RIORMWm5U9I2BZ1ehjCF1SanJHd2 sHhNLBCtms0jpo5Z2b63tPp3Y1w+CPHykuRwuyh2nnCGXMSFMaSl8KcApyMCuG0HZsemxN/ykWklQ 6HtnH+iPFZCjVAck9c/DIscF+YX686TVa9tx4Ye6CUpLI2Ws41iRCvb6A5WhaCeW1qSOMscLejxp+ v30wDaNg==; Received: from localhost ([::1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.98.2 #2 (Red Hat Linux)) id 1vpVQb-0000000FnoI-3obz; Mon, 09 Feb 2026 17:52:06 +0000 Received: from 013.lax.mailroute.net ([199.89.1.16]) by bombadil.infradead.org with esmtps (Exim 4.98.2 #2 (Red Hat Linux)) id 1vpVQZ-0000000Fnns-2340; Mon, 09 Feb 2026 17:52:04 +0000 Received: from localhost (localhost [127.0.0.1]) by 013.lax.mailroute.net (Postfix) with ESMTP id 4f8shf57YhzlfjRv; Mon, 9 Feb 2026 17:52:02 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=acm.org; h= content-transfer-encoding:content-type:content-type:in-reply-to :from:from:content-language:references:subject:subject :user-agent:mime-version:date:date:message-id:received:received; s=mr01; t=1770659519; x=1773251520; bh=wWRw45vxPzMf6IUhlILMEm7Z h4ZyPMbWLX+8yExKoms=; b=nP4ebFiQQ+2ePiCZoz4k648cjcCDTBFzscyxKGIn 7b3wEZiVYGWZxiPLtNJ1UL/6bcRmGZbbHqY1WKp4rN0wrTg1uHy3tVV/gE6qjk5G UOD2vJFwRLVUcnS6oETEE5cp7e0hVKxLzGfXcgWHH+mW8HdlywkrO95VhDWhHm37 4nL0KlB2K1irwnzrgipoTFRGaBql2aGnkJJ7EECoaSVwmUMR/JaUEoXLlY2jXCYE jQF4PjrRZXveqvZ3b3iP/+qgYrAAMWXiFM9C0KmCuXzdiKJcDoY4o5M6KbscGm/r jtI2RWcxUXMmmHfoDcj3+FLDel7wRkpGE8t7E9VDcKScOA== X-Virus-Scanned: by MailRoute Received: from 013.lax.mailroute.net ([127.0.0.1]) by localhost (013.lax [127.0.0.1]) (mroute_mailscanner, port 10029) with LMTP id toXWEeWDQ0M2; Mon, 9 Feb 2026 17:51:59 +0000 (UTC) Received: from [100.119.48.131] (unknown [104.135.180.219]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange X25519 server-signature RSA-PSS (2048 bits) server-digest SHA256) (No client certificate requested) (Authenticated sender: bvanassche@acm.org) by 013.lax.mailroute.net (Postfix) with ESMTPSA id 4f8shX1QN1zlfdCr; Mon, 9 Feb 2026 17:51:55 +0000 (UTC) Message-ID: Date: Mon, 9 Feb 2026 09:51:55 -0800 MIME-Version: 1.0 User-Agent: Mozilla Thunderbird Subject: Re: [PATCH 4/4] blk-mq: use blk_queue_enter/exit to protect debugfs file creation To: Keith Busch Cc: Yu Kuai , axboe@kernel.dk, hch@lst.de, sagi@grimberg.me, sven@kernel.org, j@jannau.net, linux-block@vger.kernel.org, linux-nvme@lists.infradead.org, tj@kernel.org, nilay@linux.ibm.com, ming.lei@redhat.com, neal@gompa.dev, asahi@lists.linux.dev, linux-arm-kernel@lists.infradead.org References: <20260209082953.3053721-1-yukuai@fnnas.com> <20260209082953.3053721-5-yukuai@fnnas.com> <6b18e0bc-efa7-4bd5-b12b-a313941d2ba1@acm.org> Content-Language: en-US From: Bart Van Assche In-Reply-To: Content-Type: text/plain; charset=UTF-8; format=flowed Content-Transfer-Encoding: 7bit X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20260209_095203_563699_F160F612 X-CRM114-Status: UNSURE ( 8.13 ) X-CRM114-Notice: Please train this message. X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.34 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+linux-arm-kernel=archiver.kernel.org@lists.infradead.org On 2/9/26 9:33 AM, Keith Busch wrote: > I had to look up the original commit that introduced the WARN, > 65d466b629847. The commit message says "Creating new debugfs entries can > trigger fs reclaim", so that must be the path that enters back into the > block layer request_queue. Thanks Keith. It's probably a good idea to integrate this information in the source code comment above the blk_queue_enter() call. Bart.