virtio: Fix GFP flags passed from the virtio balloon driver
The virtio balloon driver can dig into the reservation pools of the OS to satisfy a balloon request. This is not advisable and other balloon drivers (drivers/xen/balloon.c) avoid this as well. The patch also adds changes to avoid printing a warning if allocation fails, since we retry after sometime anyway. Signed-off-by: Balbir Singh <balbir@linux.vnet.ibm.com> Signed-off-by: Rusty Russell <rusty@rustcorp.com.au> Cc: kvm <kvm@vger.kernel.org> Cc: stable@kernel.org Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
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1 changed files with 2 additions and 1 deletions
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@ -103,7 +103,8 @@ static void fill_balloon(struct virtio_balloon *vb, size_t num)
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num = min(num, ARRAY_SIZE(vb->pfns));
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for (vb->num_pfns = 0; vb->num_pfns < num; vb->num_pfns++) {
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struct page *page = alloc_page(GFP_HIGHUSER | __GFP_NORETRY);
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struct page *page = alloc_page(GFP_HIGHUSER | __GFP_NORETRY |
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__GFP_NOMEMALLOC | __GFP_NOWARN);
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if (!page) {
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if (printk_ratelimit())
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dev_printk(KERN_INFO, &vb->vdev->dev,
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