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From: Matthew Wilcox <willy@infradead.org>
To: Christoph Hellwig <hch@infradead.org>
Cc: Manjong Lee <mj0123.lee@samsung.com>,
	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
Date: Thu, 21 Oct 2021 13:01:30 +0100	[thread overview]
Message-ID: <YXFWmo9v65kJWVWC@casper.infradead.org> (raw)
In-Reply-To: <YXFMJJ3u+x34iNy0@infradead.org>

On Thu, Oct 21, 2021 at 04:16:52AM -0700, Christoph Hellwig wrote:
> 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?

The global bdi_min_ratio needs to be adjusted.  See
bdi_set_min_ratio() in mm/page-writeback.c.

  reply	other threads:[~2021-10-21 12:04 UTC|newest]

Thread overview: 8+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
     [not found] <CGME20211021072307epcas1p4aa4388c13e71a66e3e1d5f7ee68b5a7f@epcas1p4.samsung.com>
2021-10-21 16:19 ` [PATCH 1/1] mm: bdi: Initialize bdi_min_ratio when bdi unregister Manjong Lee
2021-10-21 11:16   ` Christoph Hellwig
2021-10-21 12:01     ` Matthew Wilcox [this message]
2021-10-22  2:45       ` Andrew Morton
2021-10-22  2:58         ` Matthew Wilcox
     [not found]           ` <CGME20211022043310epcas1p22952e8fa3eb3675717badae9a3e1223e@epcas1p2.samsung.com>
2021-10-22 13:39             ` Manjong Lee
2021-12-10 21:35           ` Peter Zijlstra
2021-12-10 21:36         ` Peter Zijlstra

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