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 mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 5320FC433EF for ; Thu, 21 Oct 2021 11:16:59 +0000 (UTC) Received: from kanga.kvack.org (kanga.kvack.org [205.233.56.17]) by mail.kernel.org (Postfix) with ESMTP id D413D611F2 for ; Thu, 21 Oct 2021 11:16:56 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.4.1 mail.kernel.org D413D611F2 Authentication-Results: mail.kernel.org; dmarc=none (p=none dis=none) header.from=infradead.org Authentication-Results: mail.kernel.org; spf=pass smtp.mailfrom=kvack.org Received: by kanga.kvack.org (Postfix) id 0EE99900002; Thu, 21 Oct 2021 07:16:56 -0400 (EDT) Received: by kanga.kvack.org (Postfix, from userid 40) id 09E6D6B0072; Thu, 21 Oct 2021 07:16:56 -0400 (EDT) X-Delivered-To: int-list-linux-mm@kvack.org Received: by kanga.kvack.org (Postfix, from userid 63042) id ECE4A900002; Thu, 21 Oct 2021 07:16:55 -0400 (EDT) X-Delivered-To: linux-mm@kvack.org Received: from forelay.hostedemail.com (smtprelay0160.hostedemail.com [216.40.44.160]) by kanga.kvack.org (Postfix) with ESMTP id E05186B0071 for ; Thu, 21 Oct 2021 07:16:55 -0400 (EDT) Received: from smtpin39.hostedemail.com (10.5.19.251.rfc1918.com [10.5.19.251]) by forelay01.hostedemail.com (Postfix) with ESMTP id 981D51809921C for ; Thu, 21 Oct 2021 11:16:55 +0000 (UTC) X-FDA: 78720192390.39.B58340C Received: from bombadil.infradead.org (bombadil.infradead.org [198.137.202.133]) by imf12.hostedemail.com (Postfix) with ESMTP id E534910000A9 for ; Thu, 21 Oct 2021 11:16:54 +0000 (UTC) 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=VyH5ywSiW/7Isy9TxEdW6GuCapIoEP7S5itLkyGmeD4=; b=08Sg9xRN4pNy2S24Xgfphq+rBW fuupD+ABSSyMV8mboFL1rS2+ZJBz/rW+Vuo9MTa2huzNPpSc24z3ge8IejiNxVowGM6uMOMiBi1UM P/kbYoaBWpWOC6YrVxFbNZujUY42xT+wPuFC7A5JNbb1+wgnrSPwRC4097s7CP8U9hi+ouaQ8uad8 fahluK771dybLMYL6saStQvFLObmRMROY/NUlLGxQiTd0VpNUe9EON7Yw/TLnnMGTXiLjWBNiKNJc 8mv3xXSQcyCU3mlVbTPv2tf5BmX8cjNMYUw2pdjKXG0oOWVukClSWZjeLhDBQd+eBMS9NumdE2Noi fHziKAyQ==; Received: from hch by bombadil.infradead.org with local (Exim 4.94.2 #2 (Red Hat Linux)) id 1mdW44-007K5H-J6; Thu, 21 Oct 2021 11:16:52 +0000 Date: Thu, 21 Oct 2021 04:16:52 -0700 From: Christoph Hellwig To: Manjong Lee Cc: akpm@linux-foundation.org, linux-mm@kvack.org, linux-kernel@vger.kernel.org, seunghwan.hyun@samsung.com, sookwan7.kim@samsung.com, nanich.lee@samsung.com, yt0928.kim@samsung.com, junho89.kim@samsung.com, jisoo2146.oh@samsung.com Subject: Re: [PATCH 1/1] mm: bdi: Initialize bdi_min_ratio when bdi unregister Message-ID: References: <20211021161942.5983-1-mj0123.lee@samsung.com> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20211021161942.5983-1-mj0123.lee@samsung.com> X-SRS-Rewrite: SMTP reverse-path rewritten from by bombadil.infradead.org. See http://www.infradead.org/rpr.html X-Stat-Signature: ihgq7bxyxkp8s54rm1soa6txsnp9gf8s X-Rspamd-Server: rspam01 X-Rspamd-Queue-Id: E534910000A9 Authentication-Results: imf12.hostedemail.com; dkim=pass header.d=infradead.org header.s=bombadil.20210309 header.b=08Sg9xRN; dmarc=none; spf=none (imf12.hostedemail.com: domain of BATV+f538400d2eeb65ed2b85+6633+infradead.org+hch@bombadil.srs.infradead.org has no SPF policy when checking 198.137.202.133) smtp.mailfrom=BATV+f538400d2eeb65ed2b85+6633+infradead.org+hch@bombadil.srs.infradead.org X-HE-Tag: 1634815014-343017 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 Fri, Oct 22, 2021 at 01:19:43AM +0900, Manjong Lee wrote: > Because when sdcard is removed, bdi_min_ratio value will remain. > Currently, the only way to reset bdi_ min_ratio is to reboot. But bdis that are unregistered are never re-registered. What is the problem you're trying to solve?