linux-kernel - Re: [PATCH v2 3/3] squashfs: implement readahead

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Message-ID: <CAJMQK-gGH=5+7EwjFUVCuv2U4H0YAPGGPkuRz+00u4hnecfgQQ@mail.gmail.com>
Date:   Thu, 19 May 2022 15:56:08 +0800
From:   Hsin-Yi Wang <hsinyi@...omium.org>
To:     Xiongwei Song <sxwjean@...il.com>
Cc:     Phillip Lougher <phillip@...ashfs.org.uk>,
        Matthew Wilcox <willy@...radead.org>,
        Xiongwei Song <Xiongwei.Song@...driver.com>,
        Zheng Liang <zhengliang6@...wei.com>,
        Zhang Yi <yi.zhang@...wei.com>, Hou Tao <houtao1@...wei.com>,
        Miao Xie <miaoxie@...wei.com>,
        Andrew Morton <akpm@...ux-foundation.org>,
        "linux-mm @ kvack . org" <linux-mm@...ck.org>,
        "squashfs-devel @ lists . sourceforge . net" 
        <squashfs-devel@...ts.sourceforge.net>,
        Linux Kernel Mailing List <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH v2 3/3] squashfs: implement readahead

On Tue, May 17, 2022 at 5:17 PM Xiongwei Song <sxwjean@...il.com> wrote:
>
> On Tue, May 17, 2022 at 4:28 PM Hsin-Yi Wang <hsinyi@...omium.org> wrote:
> >
> > Implement readahead callback for squashfs. It will read datablocks
> > which cover pages in readahead request. For a few cases it will
> > not mark page as uptodate, including:
> > - file end is 0.
> > - zero filled blocks.
> > - current batch of pages isn't in the same datablock or not enough in a
> >   datablock.
> > Otherwise pages will be marked as uptodate. The unhandled pages will be
> > updated by readpage later.
> >
> > Suggested-by: Matthew Wilcox <willy@...radead.org>
> > Signed-off-by: Hsin-Yi Wang <hsinyi@...omium.org>
> > Reported-by: Matthew Wilcox <willy@...radead.org>
> > Reported-by: Phillip Lougher <phillip@...ashfs.org.uk>
> > Reported-by: Xiongwei Song <sxwjean@...il.com>
>
> "xiongwei.song@...driver.com" too.
>
ack.
<snip>