[PATCH] x86_64: Don't invoke OOM killer during dma_alloc_coherent()

There is a fallback logic, so it's better to not use the OOM killer
in the allocations.

Signed-off-by: Andi Kleen <ak@suse.de>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>

diff --git a/arch/x86_64/kernel/pci-dma.c b/arch/x86_64/kernel/pci-dma.c
index 4ed391edd47abc6df903240d374c2c87863aec4a..03c9eeedb0f30672839648984c94ec89103c9e2f 100644 (file)
--- a/arch/x86_64/kernel/pci-dma.c
+++ b/arch/x86_64/kernel/pci-dma.c
@@ -73,6 +73,9 @@ dma_alloc_coherent(struct device *dev, size_t size, dma_addr_t *dma_handle,
        if (dma_mask == 0)
                dma_mask = 0xffffffff;
 
+       /* Don't invoke OOM killer */
+       gfp |= __GFP_NORETRY;
+
        /* Kludge to make it bug-to-bug compatible with i386. i386
           uses the normal dma_mask for alloc_coherent. */
        dma_mask &= *dev->dma_mask;