linux-kernel - [PATCH V3 0/2] handle polling errors

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Message-Id: <1357456718-3072-1-git-send-email-jasowang@redhat.com>
Date:	Sun,  6 Jan 2013 15:18:36 +0800
From:	Jason Wang <jasowang@...hat.com>
To:	mst@...hat.com, kvm@...r.kernel.org,
	virtualization@...ts.linux-foundation.org, netdev@...r.kernel.org,
	linux-kernel@...r.kernel.org, eric.dumazet@...il.com,
	davem@...emloft.net
Cc:	Jason Wang <jasowang@...hat.com>
Subject: [PATCH V3 0/2] handle polling errors

This is an update version of last version to fix the handling of polling errors
in vhost/vhost_net.

Currently, vhost and vhost_net ignore polling errors which can lead kernel
crashing when it tries to remove itself from waitqueue after the polling
failure. Fix this by checking the poll->wqh before the removing and report an
error when meet polling errors.

Changes from v2:
- check poll->wqh instead of the wrong assumption about POLLERR and waitqueue
- drop the whole tx polling state check since it was replaced by the wqh
  checking
- drop the buggy tuntap patch

Changes from v1:
- restore the state before the ioctl when vhost_init_used() fails
- log the error when meet polling errors in the data path
- don't put into waitqueue when tun_chr_poll() return POLLERR

Jason Wang (2):
  vhost_net: correct error handling in vhost_net_set_backend()
  vhost: handle polling errors

 drivers/vhost/net.c   |   88 +++++++++++++++++++-----------------------------
 drivers/vhost/vhost.c |   31 +++++++++++++----
 drivers/vhost/vhost.h |    2 +-
 3 files changed, 59 insertions(+), 62 deletions(-)

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