linux-kernel - [2.6.35-rc3] select useful number of entries for DMA debugging...

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Date:	Mon, 5 Jul 2010 09:35:38 +0100
From:	Daniel J Blueman <daniel.blueman@...il.com>
To:	Linus Torvalds <torvalds@...ux-foundation.org>
Cc:	Linux Kernel <linux-kernel@...r.kernel.org>
Subject: [2.6.35-rc3] select useful number of entries for DMA debugging...

When booting 2.6.35-rc3 on some different x86 boxes with DMA debugging
enabled, I've consistently seen it exhaust the allocated entries during
boot, giving 'DMA-API: debugging out of memory - disabling'.

Increase number of entries to allow DMA debugging again.

Signed-off-by: Daniel J Blueman <daniel.blueman@...il.com>

diff --git a/arch/x86/kernel/pci-dma.c b/arch/x86/kernel/pci-dma.c
index 4b7e3d8..5ff7f12 100644
--- a/arch/x86/kernel/pci-dma.c
+++ b/arch/x86/kernel/pci-dma.c
@@ -53,7 +53,7 @@ struct device x86_dma_fallback_dev = {
 EXPORT_SYMBOL(x86_dma_fallback_dev);

 /* Number of entries preallocated for DMA-API debugging */
-#define PREALLOC_DMA_DEBUG_ENTRIES       32768
+#define PREALLOC_DMA_DEBUG_ENTRIES       65536

 int dma_set_mask(struct device *dev, u64 mask)
 {
-- 
Daniel J Blueman
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