linux-kernel - Re: [PATCH] Ceph: allocate non-zero page to fscache in readpage()

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Message-ID: <CANP1eJHthD-Q_Xv=HPWQjsJTHvpP2fj-X_j7HgBXaz5YKQ2EAQ@mail.gmail.com>
Date:	Sat, 9 Nov 2013 10:19:31 -0500
From:	Milosz Tanski <milosz@...in.com>
To:	Li Wang <liwang@...ntukylin.com>
Cc:	ceph-devel <ceph-devel@...r.kernel.org>,
	"linux-cachefs@...hat.com" <linux-cachefs@...hat.com>,
	Sage Weil <sage@...tank.com>,
	"linux-fsdevel@...r.kernel.org" <linux-fsdevel@...r.kernel.org>,
	linux-kernel@...r.kernel.org
Subject: Re: [PATCH] Ceph: allocate non-zero page to fscache in readpage()

Li, that's a good good catch.


On Fri, Nov 8, 2013 at 9:26 PM, Li Wang <liwang@...ntukylin.com> wrote:
> ceph_osdc_readpages() returns number of bytes read, currently,
> the code only allocate full-zero page into fscache, this patch
> fixes this.
>
> Signed-off-by: Li Wang <liwang@...ntukylin.com>
> ---
>  fs/ceph/addr.c |    2 +-
>  1 file changed, 1 insertion(+), 1 deletion(-)
>
> diff --git a/fs/ceph/addr.c b/fs/ceph/addr.c
> index 6df8bd4..1e561c0 100644
> --- a/fs/ceph/addr.c
> +++ b/fs/ceph/addr.c
> @@ -216,7 +216,7 @@ static int readpage_nounlock(struct file *filp, struct page *page)
>         }
>         SetPageUptodate(page);
>
> -       if (err == 0)
> +       if (err >= 0)
>                 ceph_readpage_to_fscache(inode, page);
>
>  out:
> --
> 1.7.9.5
>



-- 
Milosz Tanski
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