From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from 011.lax.mailroute.net (011.lax.mailroute.net [199.89.1.14]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 7CF5C279327; Fri, 5 Dec 2025 02:53:10 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=199.89.1.14 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1764903192; cv=none; b=GF2HGpfCU9nqreyCFldbWk1pHSTtdTfg58ioSMDPVcBVaPv5uooDU0+fJEHZon+iRlto89mUswiMWynve4f2V+xgHcey5GkqlLfjzVUDopmtkhvvKDhdDMeKOvm/BXhqFITeJrrKo62cMqVr3NVT3eUNU9GkEHvqRtY9aEH34KM= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1764903192; c=relaxed/simple; bh=iDeTfcx8x+HODREkQsaIliiDoXQQuUTEK4A31JqLPhE=; h=Message-ID:Date:MIME-Version:Subject:To:Cc:References:From: In-Reply-To:Content-Type; b=BoqQqPStD3iEStMCYPl76gz60ejFi799n4aZOg9BnESUFzbKkVT9zuOJl7z8u7V+fUmb1KGDSOKEns3+KV49bc4zVn0bTLsJTfRcPXx0lLX0d/jJ5OruiAFPoRBjx77mFXFmImM1d9Ie+37PvaCf8/+DWJzPfI1CD6+155aDLP0= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dmarc=pass (p=reject dis=none) header.from=acm.org; spf=pass smtp.mailfrom=acm.org; dkim=pass (2048-bit key) header.d=acm.org header.i=@acm.org header.b=zZtBu71+; arc=none smtp.client-ip=199.89.1.14 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=reject dis=none) header.from=acm.org Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=acm.org Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=acm.org header.i=@acm.org header.b="zZtBu71+" Received: from localhost (localhost [127.0.0.1]) by 011.lax.mailroute.net (Postfix) with ESMTP id 4dMwsq68G1z1XLyhF; Fri, 5 Dec 2025 02:53:03 +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=1764903181; x=1767495182; bh=2RaQ5X4uV+CM2Mlpi5SEV8Va vuECY7S0RBgOdY2QNs0=; b=zZtBu71+2GCtkuF0igOpYvRJ+Jw7FHwR/8AGwqaQ ptmGr1heomjm06bOOyEwUwcq/Zroy4xn6x6C2Rg0o366ZaeuM6Qiam+f3d6TqJyo Xu8p3INeLJ034pKHGpYbpAQnYJENHztOxqKu/YE0CUjatkgeB+eQx3J4suEywZ3P 5GVnUdmcHzY6EDLieNn6Q+Phthez3majjG6gSgwOObeoH7Vh41OGHopwdnRCX7CQ tl8CzNUnF7TfcaVS2udLReoniMLCGPjrtwHJH2RAbZxWyJx4On6gyEeceANE+pLj 1PqzmJ8OmDL2WZXTy6cfvC9vNU4BTYZX6u0qidNOYd50Zg== X-Virus-Scanned: by MailRoute Received: from 011.lax.mailroute.net ([127.0.0.1]) by localhost (011.lax [127.0.0.1]) (mroute_mailscanner, port 10029) with LMTP id 5YhPdnh1roj9; Fri, 5 Dec 2025 02:53:01 +0000 (UTC) Received: from [10.22.10.72] (syn-098-153-230-237.biz.spectrum.com [98.153.230.237]) (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 011.lax.mailroute.net (Postfix) with ESMTPSA id 4dMwsd3xM7z1XM0nx; Fri, 5 Dec 2025 02:52:53 +0000 (UTC) Message-ID: <0efc5d59-53dc-44c6-9466-1f662af7ee7b@acm.org> Date: Thu, 4 Dec 2025 16:52:49 -1000 Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 User-Agent: Mozilla Thunderbird Subject: Re: [PATCH 1/1] block: Use RCU in blk_mq_[un]quiesce_tagset() instead of set->tag_list_lock To: Keith Busch Cc: Mohamed Khalfella , Chaitanya Kulkarni , Christoph Hellwig , Jens Axboe , Sagi Grimberg , Casey Chen , Yuanyuan Zhong , Hannes Reinecke , Ming Lei , Waiman Long , Hillf Danton , linux-nvme@lists.infradead.org, linux-block@vger.kernel.org, linux-kernel@vger.kernel.org References: <20251204181212.1484066-2-mkhalfella@purestorage.com> <5450d3fa-3f00-40ae-ac95-1f08886de3b6@acm.org> <20251204184243.GZ337106-mkhalfella@purestorage.com> <71e9950f-ace7-4570-a604-ceca347eea20@acm.org> <20251204191555.GB337106-mkhalfella@purestorage.com> <77c5c064-2539-4ad9-8657-8a1db487522f@acm.org> <20251204195759.GC337106-mkhalfella@purestorage.com> <6994b9a7-ef2b-42f3-9e72-7489a56f8f8e@acm.org> <201a7e9e-4782-4f71-a73b-9d58a51ee8ec@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 On 12/4/25 3:32 PM, Keith Busch wrote: > I'm not interested in introducing rcu synchronize here either. I guess I > would make it so you can quiesce a tagset from a context that entered > the queue. So quick shot at that here: [ ... ] The approach of this patch looks very interesting to me. I will take a closer look at this patch when I have more time. Thanks, Bart.