diff options
Diffstat (limited to 'meta-v1000/recipes-kernel/linux/linux-yocto-4.14.71/1365-mm-remove-__GFP_COLD.patch')
| -rw-r--r-- | meta-v1000/recipes-kernel/linux/linux-yocto-4.14.71/1365-mm-remove-__GFP_COLD.patch | 58 |
1 files changed, 0 insertions, 58 deletions
diff --git a/meta-v1000/recipes-kernel/linux/linux-yocto-4.14.71/1365-mm-remove-__GFP_COLD.patch b/meta-v1000/recipes-kernel/linux/linux-yocto-4.14.71/1365-mm-remove-__GFP_COLD.patch deleted file mode 100644 index dd653855..00000000 --- a/meta-v1000/recipes-kernel/linux/linux-yocto-4.14.71/1365-mm-remove-__GFP_COLD.patch +++ /dev/null @@ -1,58 +0,0 @@ -From aed13d628771d200027f5ba415b5b1cc75a18d9d Mon Sep 17 00:00:00 2001 -From: Mel Gorman <mgorman@techsingularity.net> -Date: Wed, 15 Nov 2017 17:38:03 -0800 -Subject: [PATCH 1365/4131] mm: remove __GFP_COLD - -As the page free path makes no distinction between cache hot and cold -pages, there is no real useful ordering of pages in the free list that -allocation requests can take advantage of. Juding from the users of -__GFP_COLD, it is likely that a number of them are the result of copying -other sites instead of actually measuring the impact. Remove the -__GFP_COLD parameter which simplifies a number of paths in the page -allocator. - -This is potentially controversial but bear in mind that the size of the -per-cpu pagelists versus modern cache sizes means that the whole per-cpu -list can often fit in the L3 cache. Hence, there is only a potential -benefit for microbenchmarks that alloc/free pages in a tight loop. It's -even worse when THP is taken into account which has little or no chance -of getting a cache-hot page as the per-cpu list is bypassed and the -zeroing of multiple pages will thrash the cache anyway. - -The truncate microbenchmarks are not shown as this patch affects the -allocation path and not the free path. A page fault microbenchmark was -tested but it showed no sigificant difference which is not surprising -given that the __GFP_COLD branches are a miniscule percentage of the -fault path. - -Link: http://lkml.kernel.org/r/20171018075952.10627-9-mgorman@techsingularity.net -Signed-off-by: Mel Gorman <mgorman@techsingularity.net> -Acked-by: Vlastimil Babka <vbabka@suse.cz> -Cc: Andi Kleen <ak@linux.intel.com> -Cc: Dave Chinner <david@fromorbit.com> -Cc: Dave Hansen <dave.hansen@intel.com> -Cc: Jan Kara <jack@suse.cz> -Cc: Johannes Weiner <hannes@cmpxchg.org> -Signed-off-by: Andrew Morton <akpm@linux-foundation.org> -Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org> -Signed-off-by: Sudheesh Mavila <sudheesh.mavila@amd.com> ---- - drivers/net/ethernet/amd/xgbe/xgbe-desc.c | 2 +- - 1 file changed, 1 insertion(+), 1 deletion(-) - -diff --git a/drivers/net/ethernet/amd/xgbe/xgbe-desc.c b/drivers/net/ethernet/amd/xgbe/xgbe-desc.c -index 45d9230..cc1e4f8 100644 ---- a/drivers/net/ethernet/amd/xgbe/xgbe-desc.c -+++ b/drivers/net/ethernet/amd/xgbe/xgbe-desc.c -@@ -295,7 +295,7 @@ static int xgbe_alloc_pages(struct xgbe_prv_data *pdata, - order = alloc_order; - - /* Try to obtain pages, decreasing order if necessary */ -- gfp = GFP_ATOMIC | __GFP_COLD | __GFP_COMP | __GFP_NOWARN; -+ gfp = GFP_ATOMIC | __GFP_COMP | __GFP_NOWARN; - while (order >= 0) { - pages = alloc_pages_node(node, gfp, order); - if (pages) --- -2.7.4 - |