Hi, We can improve kvm_vm_ioctl_get_dirty_log() slightly by using vzalloc() rather than first allocating and then manually zero the memory with memset(). Also, while I was looking at this I noticed that we assign -ENOMEM to the 'r' variable twice even though none of the code inbetween the two assignments can change 'r', so I removed the second assignment. Patch has been compile tested only. Please consider merging and please CC me on all replies as I'm not subscribed to the kvm mailing list. Signed-off-by: Jesper Juhl <jj@xxxxxxxxxxxxx> --- x86.c | 4 +--- 1 file changed, 1 insertion(+), 3 deletions(-) diff --git a/arch/x86/kvm/x86.c b/arch/x86/kvm/x86.c index 2288ad8..29f9c0a 100644 --- a/arch/x86/kvm/x86.c +++ b/arch/x86/kvm/x86.c @@ -3174,12 +3174,10 @@ int kvm_vm_ioctl_get_dirty_log(struct kvm *kvm, spin_unlock(&kvm->mmu_lock); r = -ENOMEM; - dirty_bitmap = vmalloc(n); + dirty_bitmap = vzalloc(n); if (!dirty_bitmap) goto out; - memset(dirty_bitmap, 0, n); - r = -ENOMEM; slots = kzalloc(sizeof(struct kvm_memslots), GFP_KERNEL); if (!slots) { vfree(dirty_bitmap); -- Jesper Juhl <jj@xxxxxxxxxxxxx> http://www.chaosbits.net/ Plain text mails only, please http://www.expita.com/nomime.html Don't top-post http://www.catb.org/~esr/jargon/html/T/top-post.html -- To unsubscribe from this list: send the line "unsubscribe kvm" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html