From mboxrd@z Thu Jan 1 00:00:00 1970 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.subspace.kernel.org (Postfix) with ESMTPS id 0E5D928CF6B; Tue, 22 Jul 2025 05:59:13 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=198.137.202.133 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1753163955; cv=none; b=OPLD2Kc3xM0BNy4GJXw03fV2AWxHKySw40PLZwZU7Q3YKCZkvzCqKGoNz1CwkvW812xTpmvV4fDtyGxZRBJCcNLhITovMPHxz8J0QFYL7I4yUkTu/wf5O8mx5eu87UO2XN++dFKyiQyZ1TOXfr1FgPsAufEvrsitVdWM3/T5AG0= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1753163955; c=relaxed/simple; bh=dinlk1QJwMX/+sI/SBiMKZoOUaM/VmxQzR0V0OiFN4E=; h=Date:From:To:Cc:Subject:Message-ID:References:MIME-Version: Content-Type:Content-Disposition:In-Reply-To; b=RKUvR7rUWgrfjUJFHvAO60rbSZTzYmpqcPN3oopCPijyv9k4QHgsJBHkgsysDXeKPy9H3LfeqRsbFeOvhx0cEDszk4jdl3C3HXmPj/HYunK4Gq858ykTfmSFRtGG2YgXdYLRHbbAhH/UUoucr2ZgMgaCmV53M7thQfYpPnjBe60= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dmarc=none (p=none dis=none) header.from=infradead.org; spf=none smtp.mailfrom=bombadil.srs.infradead.org; dkim=pass (2048-bit key) header.d=infradead.org header.i=@infradead.org header.b=P3kDcJ1c; arc=none smtp.client-ip=198.137.202.133 Authentication-Results: smtp.subspace.kernel.org; dmarc=none (p=none dis=none) header.from=infradead.org Authentication-Results: smtp.subspace.kernel.org; spf=none smtp.mailfrom=bombadil.srs.infradead.org Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=infradead.org header.i=@infradead.org header.b="P3kDcJ1c" DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=infradead.org; s=bombadil.20210309; h=In-Reply-To:Content-Type:MIME-Version :References:Message-ID:Subject:Cc:To:From:Date:Sender:Reply-To: Content-Transfer-Encoding:Content-ID:Content-Description; bh=dinlk1QJwMX/+sI/SBiMKZoOUaM/VmxQzR0V0OiFN4E=; b=P3kDcJ1cLjlA778aEHPIId4xkO GxsWuvToia4Ks95bIa7pLdq4Acyf2auvafrCcuUlkYTTBqCW95+KF4/4rtiaZm3oe4MwoZ8s0upjP 5hiRLEnh55Doc367UoyTJsC7Jhayk0R9BSfLLkrN3ClYGWLpCcAt2bK2w0LDYTTWyB2/C3XBUjwSA vgQQfpsDuSrIxvOKrIH+lgU/536FjD5tRv32M+5+9o5RxMVvXzQPKE5uc9m5PBXKAx5kD47lmRCb7 i3SSQ9s1vXLzpkAGs20tLhdWeb6PjH/irCdFxpipNs8aFmUROLmoeCnClBdNF90t7c9vaq7y6QQKe vAYyy4Ug==; Received: from hch by bombadil.infradead.org with local (Exim 4.98.2 #2 (Red Hat Linux)) id 1ue61x-00000001Nkf-1F3m; Tue, 22 Jul 2025 05:59:13 +0000 Date: Mon, 21 Jul 2025 22:59:13 -0700 From: 'Christoph Hellwig' To: hoyoung seo Cc: 'Christoph Hellwig' , linux-scsi@vger.kernel.org, linux-kernel@vger.kernel.org, alim.akhtar@samsung.com, avri.altman@wdc.com, jejb@linux.ibm.com, martin.petersen@oracle.com, beanhuo@micron.com, bvanassche@acm.org, kwangwon.min@samsung.com, kwmad.kim@samsung.com, cpgs@samsung.com, h10.kim@samsung.com, willdeacon@google.com, jaegeuk@google.com, chao@kernel.org, linux-fsdevel@vger.kernel.org Subject: Re: [PATCH v1] writback: remove WQ_MEM_RECLAIM flag in bdi_wq Message-ID: References: <20250721064024.113841-1-hy50.seo@samsung.com> <000001dbfa1a$a2a1ad80$e7e50880$@samsung.com> Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <000001dbfa1a$a2a1ad80$e7e50880$@samsung.com> X-SRS-Rewrite: SMTP reverse-path rewritten from by bombadil.infradead.org. See http://www.infradead.org/rpr.html On Mon, Jul 21, 2025 at 05:37:03PM +0900, hoyoung seo wrote: > No way.. > It's because i just don't know much about this part. > And WQ_MEM_RECLAIM flag is absolutely necessary. As a rule of thumb try to write an explanation why a change is safe. That usually kicks of a process to think about the implications.