From: Thomas Monjalon <thomas.monjalon@6wind.com>
To: Huawei Xie <huawei.xie@intel.com>
Cc: dev@dpdk.org, mst@redhat.com
Subject: Re: [dpdk-dev] [PATCH v2] vhost: flush used->idx update before reading avail->flags
Date: Wed, 13 May 2015 12:46:30 +0200 [thread overview]
Message-ID: <1907109.z7RyHoHxuq@xps13> (raw)
In-Reply-To: <1430305884-9139-1-git-send-email-huawei.xie@intel.com>
2015-04-29 19:11, Huawei Xie:
> update of used->idx and read of avail->flags could be reordered.
> memory fence should be used to ensure the order, otherwise guest could see a stale used->idx value after it toggles the interrupt suppression flag.
> After guest sets the interrupt suppression flag, it will check if there is more buffer to process through used->idx. If it sees a stale value, it will exit the processing while host willn't send interrupt to guest.
>
> Signed-off-by: Huawei Xie <huawei.xie@intel.com>
Applied with following title, thanks
vhost: fix virtio freeze due to missed interrupt
next prev parent reply other threads:[~2015-05-13 10:47 UTC|newest]
Thread overview: 17+ messages / expand[flat|nested] mbox.gz Atom feed top
2015-04-22 16:33 [dpdk-dev] [PATCH] " Huawei Xie
2015-04-23 13:57 ` Luke Gorrie
2015-04-24 1:01 ` Linhaifeng
2015-04-24 2:40 ` Xie, Huawei
2015-04-24 7:27 ` Luke Gorrie
2015-06-09 7:04 ` Linhaifeng
2015-06-09 7:45 ` Luke Gorrie
2015-06-09 8:46 ` Michael S. Tsirkin
2015-06-09 13:34 ` Xie, Huawei
2015-06-10 2:36 ` Linhaifeng
2015-06-10 8:30 ` Luke Gorrie
2015-06-11 0:50 ` Linhaifeng
2015-04-29 11:11 ` [dpdk-dev] [PATCH v2] " Huawei Xie
2015-05-13 10:46 ` Thomas Monjalon [this message]
2015-05-15 13:43 ` Nikita Kalyazin
2015-05-15 15:23 ` Michael S. Tsirkin
2015-05-18 6:18 ` Nikita Kalyazin
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=1907109.z7RyHoHxuq@xps13 \
--to=thomas.monjalon@6wind.com \
--cc=dev@dpdk.org \
--cc=huawei.xie@intel.com \
--cc=mst@redhat.com \
/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).