linux-kernel - Re: [RFC PATCH 2/2] erofs: directly traverse pages in z_erofs

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Message-ID: <YONoXm1ksYgWWi/r@casper.infradead.org>
Date:   Mon, 5 Jul 2021 21:15:26 +0100
From:   Matthew Wilcox <willy@...radead.org>
To:     Gao Xiang <xiang@...nel.org>
Cc:     linux-erofs@...ts.ozlabs.org, LKML <linux-kernel@...r.kernel.org>
Subject: Re: [RFC PATCH 2/2] erofs: directly traverse pages in
 z_erofs_readahead()

On Tue, Jul 06, 2021 at 02:32:53AM +0800, Gao Xiang wrote:
> In that way, pages can be accessed directly with xarray.

I didn't mean "open code readahead_page()".  I meant "Wouldn't it be
great if z_erofs_do_read_page() used readahead_expand() in order to
allocate the extra pages in the extents that cover the start and end of
the requested chunk".  That way the pages would already be in the page
cache for subsequent reads.