From: Jason Wang <jasowang@redhat.com>
To: "Michael S. Tsirkin" <mst@redhat.com>, linux-kernel@vger.kernel.org
Cc: netdev@vger.kernel.org, kvm@vger.kernel.org,
virtualization@lists.linux-foundation.org
Subject: Re: [PATCH] vhost: relax log address alignment
Date: Tue, 17 Nov 2015 13:40:55 +0800 [thread overview]
Message-ID: <564ABDE7.4040700@redhat.com> (raw)
In-Reply-To: <1447685995-16282-1-git-send-email-mst@redhat.com>
On 11/16/2015 11:00 PM, Michael S. Tsirkin wrote:
> commit 5d9a07b0de512b77bf28d2401e5fe3351f00a240 ("vhost: relax used
> address alignment") fixed the alignment for the used virtual address,
> but not for the physical address used for logging.
>
> That's a mistake: alignment should clearly be the same for virtual and
> physical addresses,
>
> Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
> ---
> drivers/vhost/vhost.c | 2 +-
> 1 file changed, 1 insertion(+), 1 deletion(-)
>
> diff --git a/drivers/vhost/vhost.c b/drivers/vhost/vhost.c
> index eec2f11..080422f 100644
> --- a/drivers/vhost/vhost.c
> +++ b/drivers/vhost/vhost.c
> @@ -819,7 +819,7 @@ long vhost_vring_ioctl(struct vhost_dev *d, int ioctl, void __user *argp)
> BUILD_BUG_ON(__alignof__ *vq->used > VRING_USED_ALIGN_SIZE);
> if ((a.avail_user_addr & (VRING_AVAIL_ALIGN_SIZE - 1)) ||
> (a.used_user_addr & (VRING_USED_ALIGN_SIZE - 1)) ||
> - (a.log_guest_addr & (sizeof(u64) - 1))) {
> + (a.log_guest_addr & (VRING_USED_ALIGN_SIZE - 1))) {
> r = -EINVAL;
> break;
> }
Acked-by: Jason Wang <jasowang@redhat.com>
prev parent reply other threads:[~2015-11-17 5:40 UTC|newest]
Thread overview: 2+ messages / expand[flat|nested] mbox.gz Atom feed top
2015-11-16 15:00 [PATCH] vhost: relax log address alignment Michael S. Tsirkin
2015-11-17 5:40 ` Jason Wang [this message]
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=564ABDE7.4040700@redhat.com \
--to=jasowang@redhat.com \
--cc=kvm@vger.kernel.org \
--cc=linux-kernel@vger.kernel.org \
--cc=mst@redhat.com \
--cc=netdev@vger.kernel.org \
--cc=virtualization@lists.linux-foundation.org \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox;
as well as URLs for NNTP newsgroup(s).