lkml.org 
[lkml]   [2017]   [Dec]   [19]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
Patch in this message
/
From
Subject[PATCH] swiotlb: suppress warning when __GFP_NOWARN is set.
Date
TTM tries to allocate coherent memory in chunks of 2MB first to improve
TLB efficiency and falls back to allocating 4K pages if that fails.

Suppress the warning when the 2MB allocations fails since there is a
valid fall back path.

Signed-off-by: Christian König <christian.koenig@amd.com>
---
lib/swiotlb.c | 8 +++++---
1 file changed, 5 insertions(+), 3 deletions(-)

diff --git a/lib/swiotlb.c b/lib/swiotlb.c
index cea19aaf303c..63a44fb29ce6 100644
--- a/lib/swiotlb.c
+++ b/lib/swiotlb.c
@@ -769,9 +769,11 @@ swiotlb_alloc_coherent(struct device *hwdev, size_t size,
return ret;

err_warn:
- pr_warn("swiotlb: coherent allocation failed for device %s size=%zu\n",
- dev_name(hwdev), size);
- dump_stack();
+ if (!(flags & __GFP_NOWARN)) {
+ pr_warn("swiotlb: coherent allocation failed for device %s size=%zu\n",
+ dev_name(hwdev), size);
+ dump_stack();
+ }

return NULL;
}
--
2.11.0
\
 
 \ /
  Last update: 2017-12-19 15:33    [W:0.082 / U:1.604 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site