From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from eggs.gnu.org ([2001:4830:134:3::10]:35852) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1Z0KOV-0002gh-3n for qemu-devel@nongnu.org; Wed, 03 Jun 2015 21:56:31 -0400 Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1Z0KOR-0007RQ-UY for qemu-devel@nongnu.org; Wed, 03 Jun 2015 21:56:31 -0400 Received: from mx1.redhat.com ([209.132.183.28]:36598) by eggs.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1Z0KOR-0007Og-NN for qemu-devel@nongnu.org; Wed, 03 Jun 2015 21:56:27 -0400 Date: Thu, 4 Jun 2015 09:56:23 +0800 From: Fam Zheng Message-ID: <20150604015623.GC3948@ad.nay.redhat.com> References: <1433323815-15841-1-git-send-email-stefanha@redhat.com> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <1433323815-15841-1-git-send-email-stefanha@redhat.com> Subject: Re: [Qemu-devel] [PATCH] Revert "iothread: release iothread around aio_poll" List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , To: Stefan Hajnoczi Cc: Christian Borntraeger , qemu-devel@nongnu.org, Paolo Bonzini On Wed, 06/03 10:30, Stefan Hajnoczi wrote: > This reverts commit a0710f7995f914e3044e5899bd8ff6c43c62f916. > > In qemu-devel email message <556DBF87.2020908@de.ibm.com>, Christian > Borntraeger writes: > > Having many guests all with a kernel/ramdisk (via -kernel) and > several null block devices will result in hangs. All hanging > guests are in partition detection code waiting for an I/O to return > so very early maybe even the first I/O. > > Reverting that commit "fixes" the hangs. > > Reverting this commit for the 2.4 release. More time is needed to > investigate and correct this patch. > > Reported-by: Christian Borntraeger > Suggested-by: Paolo Bonzini > Signed-off-by: Stefan Hajnoczi Reviewed-by: Fam Zheng