From: Herbert Xu Subject: Re: [PATCH v5 REPOST 0/6] fix hw_random stuck Date: Mon, 22 Dec 2014 23:05:16 +1100 Message-ID: <20141222120515.GD21045@gondor.apana.org.au> References: <1418028640-4891-1-git-send-email-akong@redhat.com> Mime-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Cc: kvm@vger.kernel.org, linux-kernel@vger.kernel.org, virtualization@lists.linux-foundation.org, linux-crypto@vger.kernel.org, m@bues.ch, mpm@selenic.com, amit.shah@redhat.com To: Amos Kong Return-path: Content-Disposition: inline In-Reply-To: <1418028640-4891-1-git-send-email-akong@redhat.com> List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Sender: virtualization-bounces@lists.linux-foundation.org Errors-To: virtualization-bounces@lists.linux-foundation.org List-Id: linux-crypto.vger.kernel.org On Mon, Dec 08, 2014 at 04:50:34PM +0800, Amos Kong wrote: > When I hotunplug a busy virtio-rng device or try to access > hwrng attributes in non-smp guest, it gets stuck. > > My hotplug tests: > > | test 0: > | hotunplug rng device from qemu monitor > | > | test 1: > | guest) # dd if=/dev/hwrng of=/dev/null & > | hotunplug rng device from qemu monitor > | > | test 2: > | guest) # dd if=/dev/random of=/dev/null & > | hotunplug rng device from qemu monitor > | > | test 4: > | guest) # dd if=/dev/hwrng of=/dev/null & > | cat /sys/devices/virtual/misc/hw_random/rng_* > | > | test 5: > | guest) # dd if=/dev/hwrng of=/dev/null > | cancel dd process after 10 seconds > | guest) # dd if=/dev/hwrng of=/dev/null & > | hotunplug rng device from qemu monitor > | > | test 6: > | use a fifo as rng backend, execute test 0 ~ 5 with no input of fifo All applied. Thanks a lot! -- Email: Herbert Xu Home Page: http://gondor.apana.org.au/~herbert/ PGP Key: http://gondor.apana.org.au/~herbert/pubkey.txt