search for: qemu_madvise

...ge size is larger than the > target page size. > > static void balloon_page(void *addr, int deflate) > { > #if defined(__linux__) > if (!qemu_balloon_is_inhibited() && (!kvm_enabled() || > kvm_has_sync_mmu())) { > qemu_madvise(addr, TARGET_PAGE_SIZE, > deflate ? QEMU_MADV_WILLNEED : QEMU_MADV_DONTNEED); > } > #endif > } > > The virtio-balloon code only does stuff through ballon_page, > and an madvise DONTNEED should fail if you try and do it on > a size smaller than the host p...

...ge size is larger than the > target page size. > > static void balloon_page(void *addr, int deflate) > { > #if defined(__linux__) > if (!qemu_balloon_is_inhibited() && (!kvm_enabled() || > kvm_has_sync_mmu())) { > qemu_madvise(addr, TARGET_PAGE_SIZE, > deflate ? QEMU_MADV_WILLNEED : QEMU_MADV_DONTNEED); > } > #endif > } > > The virtio-balloon code only does stuff through ballon_page, > and an madvise DONTNEED should fail if you try and do it on > a size smaller than the host p...

...ram_pagesize(rb); > > host_addr = (void *)((uintptr_t)addr & ~(rb_page_size - 1)); > + size &= ~(rb_page_size - 1); > > /* When a page is deflated, we hint the whole host page it lives > * on, since we can't do anything smaller */ > - ret = qemu_madvise(host_addr, rb_page_size, QEMU_MADV_WILLNEED); > + ret = qemu_madvise(host_addr, size, QEMU_MADV_WILLNEED); > if (ret != 0) { > warn_report("Couldn't MADV_WILLNEED on balloon deflate: %s", > strerror(errno)); > @@ -354,7 +356,7 @@ st...

...l that happens when we get a page is balloon_page. > and > > static void balloon_page(void *addr, int deflate) { #if defined(__linux__) > if (!qemu_balloon_is_inhibited() && (!kvm_enabled() || > kvm_has_sync_mmu())) { > qemu_madvise(addr, TARGET_PAGE_SIZE, > deflate ? QEMU_MADV_WILLNEED : QEMU_MADV_DONTNEED); > } > #endif > } > > > Do you see anything that tracks pages to help migration skip the ballooned > memory? I don't. > No. And it's exactly what I mean. The ballo...

...l that happens when we get a page is balloon_page. > and > > static void balloon_page(void *addr, int deflate) { #if defined(__linux__) > if (!qemu_balloon_is_inhibited() && (!kvm_enabled() || > kvm_has_sync_mmu())) { > qemu_madvise(addr, TARGET_PAGE_SIZE, > deflate ? QEMU_MADV_WILLNEED : QEMU_MADV_DONTNEED); > } > #endif > } > > > Do you see anything that tracks pages to help migration skip the ballooned > memory? I don't. > No. And it's exactly what I mean. The ballo...

...(section.mr); } so all that happens when we get a page is balloon_page. and static void balloon_page(void *addr, int deflate) { #if defined(__linux__) if (!qemu_balloon_is_inhibited() && (!kvm_enabled() || kvm_has_sync_mmu())) { qemu_madvise(addr, TARGET_PAGE_SIZE, deflate ? QEMU_MADV_WILLNEED : QEMU_MADV_DONTNEED); } #endif } Do you see anything that tracks pages to help migration skip the ballooned memory? I don't. > > > The only advantage of ' inflating the balloon before live migration'...

> Subject: Re: [Qemu-devel] [RFC qemu 0/4] A PV solution for live migration > optimization > > On Fri, Mar 04, 2016 at 09:08:44AM +0000, Li, Liang Z wrote: > > > On Fri, Mar 04, 2016 at 01:52:53AM +0000, Li, Liang Z wrote: > > > > > I wonder if it would be possible to avoid the kernel changes > > > > > by parsing /proc/self/pagemap - if that

> Subject: Re: [Qemu-devel] [RFC qemu 0/4] A PV solution for live migration > optimization > > On Fri, Mar 04, 2016 at 09:08:44AM +0000, Li, Liang Z wrote: > > > On Fri, Mar 04, 2016 at 01:52:53AM +0000, Li, Liang Z wrote: > > > > > I wonder if it would be possible to avoid the kernel changes > > > > > by parsing /proc/self/pagemap - if that

...age is balloon_page. > > and > > > > static void balloon_page(void *addr, int deflate) { #if defined(__linux__) > > if (!qemu_balloon_is_inhibited() && (!kvm_enabled() || > > kvm_has_sync_mmu())) { > > qemu_madvise(addr, TARGET_PAGE_SIZE, > > deflate ? QEMU_MADV_WILLNEED : QEMU_MADV_DONTNEED); > > } > > #endif > > } > > > > > > Do you see anything that tracks pages to help migration skip the ballooned > > memory? I don't. > > &gt...