From: Christoph Hellwig <hch@infradead.org>
To: Bean Huo <huobean@gmail.com>
Cc: akpm@linux-foundation.org, linux-mm@kvack.org,
linux-kernel@vger.kernel.org, beanhuo@micron.com,
Richard Weinberger <richard@nod.at>,
linux-mtd@lists.infradead.org
Subject: Re: [PATCH RFC] mm: Let readahead submit larger batches of pages in case of ra->ra_pages == 0
Date: Mon, 7 Sep 2020 08:16:19 +0100 [thread overview]
Message-ID: <20200907071619.GA28569@infradead.org> (raw)
In-Reply-To: <20200904144807.31810-1-huobean@gmail.com>
On Fri, Sep 04, 2020 at 04:48:07PM +0200, Bean Huo wrote:
> From: Bean Huo <beanhuo@micron.com>
>
> Current generic_file_buffered_read() will break up the larger batches of pages
> and read data in single page length in case of ra->ra_pages == 0. This patch is
> to allow it to pass the batches of pages down to the device if the supported
> maximum IO size >= the requested size.
At least ubifs and mtd seem to force ra_pages = 0 to disable read-ahead
entirely, so this seems intentional.
prev parent reply other threads:[~2020-09-07 7:16 UTC|newest]
Thread overview: 7+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-09-04 14:48 [PATCH RFC] mm: Let readahead submit larger batches of pages in case of ra->ra_pages == 0 Bean Huo
2020-09-04 18:09 ` Andrew Morton
2020-09-11 8:15 ` Bean Huo
2020-09-11 9:47 ` Christoph Hellwig
2020-09-11 11:35 ` Bean Huo
2020-09-11 11:36 ` Bean Huo
2020-09-07 7:16 ` Christoph Hellwig [this message]
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