Am 11.01.2011 11:29, Avi Kivity wrote:
Please try out the attached patch.
From f3a6041b5bb3bf7c88f9694a66d7f34be2f78845 Mon Sep 17 00:00:00 2001
From: Avi Kivity a...@redhat.com
Date: Tue, 11 Jan 2011 12:15:54 +0200
Subject: [PATCH] KVM: Initialize fpu state in preemptible context
On 01/13/2011 02:59 PM, Jan Kiszka wrote:
@@ -5351,6 +5351,9 @@ int kvm_arch_vcpu_ioctl_run(struct kvm_vcpu *vcpu,
struct kvm_run *kvm_run)
int r;
sigset_t sigsaved;
+ if (!tsk_used_math(current) init_fpu(current))
+ return -ENOMEM;
+
Could become a rainy day for the
7c6fbfed72e7d22cbdf7393f9711d521e0fbb4a6 Mon Sep 17 00:00:00 2001
From: Kirill A. Shutemovkir...@shutemov.name
Date: Mon, 10 Jan 2011 21:24:23 +0200
Subject: [PATCH] x86, fpu_alloc(): call kmem_cache_alloc() with GFP_ATOMIC
[ 182.878328] BUG: sleeping function called from invalid context at
mm/slub.c:793
[ 182.878339
] BUG: sleeping function called from invalid
context at mm/slub.c:793
[ 182.878339] in_atomic(): 1, irqs_disabled(): 0, pid: 4992,
name: qemu
[ 182.878355] Pid: 4992, comm: qemu Not tainted 2.6.37+ #31
[ 182.878361] Call Trace:
[ 182.878381] [c104e317] ? __might_sleep+0xd0/0xd7
run qemu with KVM enabled I get this in dmesg:
[ 182.878328] BUG: sleeping function called from invalid
context at mm/slub.c:793
[ 182.878339] in_atomic(): 1, irqs_disabled(): 0, pid: 4992,
name: qemu
[ 182.878355] Pid: 4992, comm: qemu Not tainted 2.6.37+ #31
On Tue, Jan 11, 2011 at 1:13 PM, Kirill A. Shutemov
kir...@shutemov.name wrote:
Please try out the attached patch.
It helps.
Reported-and-tested-by: Kirill A. Shutemov k...@openvz.org
Acked-by: Pekka Enberg penb...@kernel.org
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Reviewed-by: Christoph Lameter c...@linux.com
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On Mon, 10 Jan 2011, Kirill A. Shutemov wrote:
Every time I run qemu with KVM enabled I get this in dmesg:
[ 182.878328] BUG: sleeping function called from invalid context at
mm/slub.c:793
[ 182.878339] in_atomic(): 1, irqs_disabled(): 0, pid: 4992, name: qemu
[ 182.878355] Pid: 4992
On Mon, Jan 10, 2011 at 10:52:05AM -0600, Christoph Lameter wrote:
On Mon, 10 Jan 2011, Kirill A. Shutemov wrote:
Every time I run qemu with KVM enabled I get this in dmesg:
[ 182.878328] BUG: sleeping function called from invalid context at
mm/slub.c:793
[ 182.878339] in_atomic
