From: Andi Kleen <ak@suse.de>
Date: Sat, 25 Mar 2006 15:30:43 +0000 (+0100)
Subject: [PATCH] x86_64: Don't invoke OOM killer during dma_alloc_coherent()
X-Git-Tag: firefly_0821_release~37117
X-Git-Url: http://demsky.eecs.uci.edu/git/?a=commitdiff_plain;h=3056d6be19b50cbd3f0290e816d702cc3e54a6f3;p=firefly-linux-kernel-4.4.55.git

[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 4ed391edd47a..03c9eeedb0f3 100644
--- 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;