linux-kernel - Re: [PATCH v2 4/4] xen/netback: fix grant copy across page boundary

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Date:   Wed, 22 Jan 2020 14:05:12 +0000
From:   Wei Liu <wei.liu@...nel.org>
To:     Sergey Dyasli <sergey.dyasli@...rix.com>
Cc:     Paul Durrant <pdurrant@...il.com>, xen-devel@...ts.xen.org,
        kasan-dev@...glegroups.com, linux-mm@...ck.org,
        linux-kernel@...r.kernel.org,
        Andrey Ryabinin <aryabinin@...tuozzo.com>,
        Alexander Potapenko <glider@...gle.com>,
        Dmitry Vyukov <dvyukov@...gle.com>,
        Boris Ostrovsky <boris.ostrovsky@...cle.com>,
        Juergen Gross <jgross@...e.com>,
        Stefano Stabellini <sstabellini@...nel.org>,
        George Dunlap <george.dunlap@...rix.com>,
        Ross Lagerwall <ross.lagerwall@...rix.com>,
        Andrew Morton <akpm@...ux-foundation.org>,
        Wei Liu <wei.liu@...nel.org>
Subject: Re: [PATCH v2 4/4] xen/netback: fix grant copy across page boundary

On Wed, Jan 22, 2020 at 10:07:35AM +0000, Sergey Dyasli wrote:
> On 20/01/2020 08:58, Paul Durrant wrote:
> > On Fri, 17 Jan 2020 at 12:59, Sergey Dyasli <sergey.dyasli@...rix.com> wrote:
> >>
> >> From: Ross Lagerwall <ross.lagerwall@...rix.com>
> >>
> >> When KASAN (or SLUB_DEBUG) is turned on, there is a higher chance that
> >> non-power-of-two allocations are not aligned to the next power of 2 of
> >> the size. Therefore, handle grant copies that cross page boundaries.
> >>
> >> Signed-off-by: Ross Lagerwall <ross.lagerwall@...rix.com>
> >> Signed-off-by: Sergey Dyasli <sergey.dyasli@...rix.com>
> >> ---
> >> v1 --> v2:
> >> - Use sizeof_field(struct sk_buff, cb)) instead of magic number 48
> >> - Slightly update commit message
> >>
> >> RFC --> v1:
> >> - Added BUILD_BUG_ON to the netback patch
> >> - xenvif_idx_release() now located outside the loop
> >>
> >> CC: Wei Liu <wei.liu@...nel.org>
> >> CC: Paul Durrant <paul@....org>
> >
> > Acked-by: Paul Durrant <paul@....org>
> 
> Thanks! I believe this patch can go in independently from the other
> patches in the series. What else is required for this?

This patch didn't Cc the network development list so David Miller
wouldn't be able to pick it up.

Wei.

> 
> --
> Sergey