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Fix for vmalloc_32 failure (rhbz 1482249)

This commit is contained in:
Laura Abbott 2017-08-17 08:10:57 -07:00
parent ee7eaf6837
commit 94d0b8629a
2 changed files with 79 additions and 0 deletions
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73
0001-mm-vmalloc-Don-t-unconditonally-use-__GFP_HIGHMEM.patch Normal file
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@ -0,0 +1,73 @@
From caa7919d0402b9ebe40ac3f5228c31e28a933327 Mon Sep 17 00:00:00 2001
From: Laura Abbott <labbott@redhat.com>
Date: Wed, 16 Aug 2017 14:56:31 -0700
Subject: [PATCH] mm/vmalloc: Don't unconditonally use __GFP_HIGHMEM
To: Andrew Morton <akpm@linux-foundation.org>
To: Michal Hocko <mhocko@suse.com>
To: Vlastimil Babka <vbabka@suse.cz>
To: "Kirill A. Shutemov" <kirill.shutemov@linux.intel.com>
Cc: linux-mm@kvack.org
Cc: linux-kernel@vger.kernel.org
Commit 19809c2da28a ("mm, vmalloc: use __GFP_HIGHMEM implicitly")
added use of __GFP_HIGHMEM for allocations. vmalloc_32 may use
GFP_DMA/GFP_DMA32 which does not play nice with __GFP_HIGHMEM
and will drigger a BUG in gfp_zone. Only add __GFP_HIGHMEM if
we aren't using GFP_DMA/GFP_DMA32.
Bugzilla: https://bugzilla.redhat.com/show_bug.cgi?id=1482249
Fixes: 19809c2da28a ("mm, vmalloc: use __GFP_HIGHMEM implicitly")
Signed-off-by: Laura Abbott <labbott@redhat.com>
---
mm/vmalloc.c | 13 ++++++++-----
1 file changed, 8 insertions(+), 5 deletions(-)
diff --git a/mm/vmalloc.c b/mm/vmalloc.c
index 8698c1c86c4d..a47e3894c775 100644
--- a/mm/vmalloc.c
+++ b/mm/vmalloc.c
@@ -1671,7 +1671,10 @@ static void *__vmalloc_area_node(struct vm_struct *area, gfp_t gfp_mask,
struct page **pages;
unsigned int nr_pages, array_size, i;
const gfp_t nested_gfp = (gfp_mask & GFP_RECLAIM_MASK) | __GFP_ZERO;
- const gfp_t alloc_mask = gfp_mask | __GFP_HIGHMEM | __GFP_NOWARN;
+ const gfp_t alloc_mask = gfp_mask | __GFP_NOWARN;
+ const gfp_t highmem_mask = (gfp_mask & (GFP_DMA | GFP_DMA32)) ?
+ 0 :
+ __GFP_HIGHMEM;
nr_pages = get_vm_area_size(area) >> PAGE_SHIFT;
array_size = (nr_pages * sizeof(struct page *));
@@ -1679,7 +1682,7 @@ static void *__vmalloc_area_node(struct vm_struct *area, gfp_t gfp_mask,
area->nr_pages = nr_pages;
/* Please note that the recursion is strictly bounded. */
if (array_size > PAGE_SIZE) {
- pages = __vmalloc_node(array_size, 1, nested_gfp|__GFP_HIGHMEM,
+ pages = __vmalloc_node(array_size, 1, nested_gfp|highmem_mask,
PAGE_KERNEL, node, area->caller);
} else {
pages = kmalloc_node(array_size, nested_gfp, node);
@@ -1700,9 +1703,9 @@ static void *__vmalloc_area_node(struct vm_struct *area, gfp_t gfp_mask,
}
if (node == NUMA_NO_NODE)
- page = alloc_page(alloc_mask);
+ page = alloc_page(alloc_mask|highmem_mask);
else
- page = alloc_pages_node(node, alloc_mask, 0);
+ page = alloc_pages_node(node, alloc_mask|highmem_mask, 0);
if (unlikely(!page)) {
/* Successfully allocated i pages, free them in __vunmap() */
@@ -1710,7 +1713,7 @@ static void *__vmalloc_area_node(struct vm_struct *area, gfp_t gfp_mask,
goto fail;
}
area->pages[i] = page;
- if (gfpflags_allow_blocking(gfp_mask))
+ if (gfpflags_allow_blocking(gfp_mask|highmem_mask))
cond_resched();
}
--
2.13.0

6
kernel.spec
View File

@ -649,6 +649,9 @@ Patch617: Fix-for-module-sig-verification.patch
# request for bug fix
Patch618: iio-race-fix.patch
# rhbz 1482249
Patch619: 0001-mm-vmalloc-Don-t-unconditonally-use-__GFP_HIGHMEM.patch
# END OF PATCH DEFINITIONS
%endif
@ -2202,6 +2205,9 @@ fi
#
#
%changelog
* Thu Aug 17 2017 Laura Abbott <labbott@fedoraproject.org>
- Fix for vmalloc_32 failure (rhbz 1482249)
* Wed Aug 16 2017 Laura Abbott <labbott@fedoraproject.org> - 4.13.0-0.rc5.git2.1
- Linux v4.13-rc5-67-g510c8a899caf