> -----Original Message-----
> From: Paolo Bonzini [mailto:pbonz...@redhat.com]
> Sent: Friday, May 24, 2013 1:13 AM
> To: Hao, Xudong
> Cc: kvm@vger.kernel.org; g...@redhat.com; qemu-de...@nongnu.org
> Subject: Re: [PATCH] qemu-kvm: fix unmatched RAM alloction/free
>
> > mmap is used in qemu_vmalloc function instead of qemu_memalign(commit
> > 7dda5dc8), so it should change qemu_vfree to munmap to fix a unmatched
> > issue.
> >
> > This issue appears when a PCI device is being assigned to KVM guest,
> > failure to read PCI rom file will bring RAM free, then the incorrect
> > qemu_vfree calling will cause a segment fault.
> >
> > Signed-off-by: Xudong Hao <xudong....@intel.com>
> > ---
> > exec.c | 6 +-----
> > 1 files changed, 1 insertions(+), 5 deletions(-)
> >
> > diff --git a/exec.c b/exec.c
> > index fa1e0c3..d40d237 100644
> > --- a/exec.c
> > +++ b/exec.c
> > @@ -1152,15 +1152,11 @@ void qemu_ram_free(ram_addr_t addr)
> > abort();
> > #endif
> > } else {
> > -#if defined(TARGET_S390X) && defined(CONFIG_KVM)
> > - munmap(block->host, block->length);
> > -#else
> > if (xen_enabled()) {
> > xen_invalidate_map_cache_entry(block->host);
> > } else {
> > - qemu_vfree(block->host);
> > + munmap(block->host, block->length);
> > }
> > -#endif
> > }
> > g_free(block);
> > break;
>
> Just "git pull". :) This is very similar to commit e7a09b9 (osdep: introduce
> qemu_anon_ram_free to free qemu_anon_ram_alloc-ed memory, 2013-05-13)
>
OK, this commit do the same thing as my patch, I did not notice qemu upstream
tree, just take a look at qemu-kvm tree, but I think this commit should be
backport to qemu-kvm tree, because many user are using qemu-kvm for KVM.
Anyway please ignore this patch.
Thanks,
-Xudong
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