From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from eggs.gnu.org ([2001:4830:134:3::10]:35963) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1YtAhs-0000PD-QL for qemu-devel@nongnu.org; Fri, 15 May 2015 04:10:57 -0400 Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1YtAhp-0007WP-11 for qemu-devel@nongnu.org; Fri, 15 May 2015 04:10:56 -0400 Received: from mail-wi0-x231.google.com ([2a00:1450:400c:c05::231]:36901) by eggs.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1YtAho-0007WL-QS for qemu-devel@nongnu.org; Fri, 15 May 2015 04:10:52 -0400 Received: by wibt6 with SMTP id t6so48071057wib.0 for ; Fri, 15 May 2015 01:10:52 -0700 (PDT) Sender: Paolo Bonzini Message-ID: <5555AA09.3090709@redhat.com> Date: Fri, 15 May 2015 10:10:49 +0200 From: Paolo Bonzini MIME-Version: 1.0 References: <5555937A.40109@wiesinger.com> <55559768.4010104@redhat.com> <5555A24C.9070907@wiesinger.com> In-Reply-To: <5555A24C.9070907@wiesinger.com> Content-Type: text/plain; charset=utf-8 Content-Transfer-Encoding: 7bit Subject: Re: [Qemu-devel] Kernel Panic on Yum update List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , To: Gerhard Wiesinger , qemu-devel On 15/05/2015 09:37, Gerhard Wiesinger wrote: >> > > Yes, yum takes memory. But there is ~2.2 GB virt memory available. That > should be enough. Therefore I think it is a kernel problem. As in > previous crashes on the mailing list there is a lot of swap available > (2GB) which isn't touched in ANY way. > > Under normal conditions without yum: > free > total used free shared buff/cache > available > Mem: 243036 132540 12716 15520 97780 74964 > Swap: 2064380 0 2064380 Not all memory is the same. Some memory cannot be swapped, and some memory can be swapped to disk without a swap file (e.g. executables). Failing an order 0 allocation is weird indeed, but this is a GFP_ATOMIC allocation so it's a bit less weird. Paolo