[PATCH 2.6.11] AIO panic on PPC64 caused byis_hugepage_only_range()
From: Daniel McNeil
Date: Tue Mar 22 2005 - 14:28:49 EST
On Mon, 2005-03-21 at 18:41, Andrew Morton wrote:
> Did we fix this yet?
>
Here's a patch against 2.6.11 that fixes the problem.
It changes is_hugepage_only_range() to take mm as an argument
and then changes the places that call it to pass 'mm'.
It includes a change for ia64 which has not been compiled.
It applies against the latest bk with some offset.
Signed-off-by: Daniel McNeil <daniel@xxxxxxxx>
diff -urp linux-2.6.11.orig/arch/ppc64/mm/hugetlbpage.c linux-2.6.11/arch/ppc64/mm/hugetlbpage.c
--- linux-2.6.11.orig/arch/ppc64/mm/hugetlbpage.c 2005-03-22 09:43:09.000000000 -0800
+++ linux-2.6.11/arch/ppc64/mm/hugetlbpage.c 2005-03-22 09:45:46.000000000 -0800
@@ -512,7 +512,7 @@ unsigned long arch_get_unmapped_area(str
vma = find_vma(mm, addr);
if (((TASK_SIZE - len) >= addr)
&& (!vma || (addr+len) <= vma->vm_start)
- && !is_hugepage_only_range(addr,len))
+ && !is_hugepage_only_range(mm, addr,len))
return addr;
}
start_addr = addr = mm->free_area_cache;
@@ -522,7 +522,7 @@ full_search:
while (TASK_SIZE - len >= addr) {
BUG_ON(vma && (addr >= vma->vm_end));
- if (touches_hugepage_low_range(addr, len)) {
+ if (touches_hugepage_low_range(mm, addr, len)) {
addr = ALIGN(addr+1, 1<<SID_SHIFT);
vma = find_vma(mm, addr);
continue;
@@ -583,7 +583,7 @@ arch_get_unmapped_area_topdown(struct fi
vma = find_vma(mm, addr);
if (TASK_SIZE - len >= addr &&
(!vma || addr + len <= vma->vm_start)
- && !is_hugepage_only_range(addr,len))
+ && !is_hugepage_only_range(mm, addr,len))
return addr;
}
@@ -596,7 +596,7 @@ try_again:
addr = (mm->free_area_cache - len) & PAGE_MASK;
do {
hugepage_recheck:
- if (touches_hugepage_low_range(addr, len)) {
+ if (touches_hugepage_low_range(mm, addr, len)) {
addr = (addr & ((~0) << SID_SHIFT)) - len;
goto hugepage_recheck;
} else if (touches_hugepage_high_range(addr, len)) {
diff -urp linux-2.6.11.orig/include/asm-ia64/page.h linux-2.6.11/include/asm-ia64/page.h
--- linux-2.6.11.orig/include/asm-ia64/page.h 2005-03-01 23:37:48.000000000 -0800
+++ linux-2.6.11/include/asm-ia64/page.h 2005-03-21 16:58:54.000000000 -0800
@@ -137,7 +137,7 @@ typedef union ia64_va {
# define htlbpage_to_page(x) (((unsigned long) REGION_NUMBER(x) << 61) \
| (REGION_OFFSET(x) >> (HPAGE_SHIFT-PAGE_SHIFT)))
# define HUGETLB_PAGE_ORDER (HPAGE_SHIFT - PAGE_SHIFT)
-# define is_hugepage_only_range(addr, len) \
+# define is_hugepage_only_range(mm, addr, len) \
(REGION_NUMBER(addr) == REGION_HPAGE && \
REGION_NUMBER((addr)+(len)) == REGION_HPAGE)
extern unsigned int hpage_shift;
diff -urp linux-2.6.11.orig/include/asm-ppc64/page.h linux-2.6.11/include/asm-ppc64/page.h
--- linux-2.6.11.orig/include/asm-ppc64/page.h 2005-03-01 23:37:30.000000000 -0800
+++ linux-2.6.11/include/asm-ppc64/page.h 2005-03-21 16:59:46.000000000 -0800
@@ -48,8 +48,8 @@
#define ARCH_HAS_HUGEPAGE_ONLY_RANGE
#define ARCH_HAS_PREPARE_HUGEPAGE_RANGE
-#define touches_hugepage_low_range(addr, len) \
- (LOW_ESID_MASK((addr), (len)) & current->mm->context.htlb_segs)
+#define touches_hugepage_low_range(mm, addr, len) \
+ (LOW_ESID_MASK((addr), (len)) & mm->context.htlb_segs)
#define touches_hugepage_high_range(addr, len) \
(((addr) > (TASK_HPAGE_BASE-(len))) && ((addr) < TASK_HPAGE_END))
@@ -61,9 +61,9 @@
#define within_hugepage_high_range(addr, len) (((addr) >= TASK_HPAGE_BASE) \
&& ((addr)+(len) <= TASK_HPAGE_END) && ((addr)+(len) >= (addr)))
-#define is_hugepage_only_range(addr, len) \
+#define is_hugepage_only_range(mm, addr, len) \
(touches_hugepage_high_range((addr), (len)) || \
- touches_hugepage_low_range((addr), (len)))
+ touches_hugepage_low_range((mm), (addr), (len)))
#define HAVE_ARCH_HUGETLB_UNMAPPED_AREA
#define in_hugepage_area(context, addr) \
diff -urp linux-2.6.11.orig/include/linux/hugetlb.h linux-2.6.11/include/linux/hugetlb.h
--- linux-2.6.11.orig/include/linux/hugetlb.h 2005-03-21 16:50:21.000000000 -0800
+++ linux-2.6.11/include/linux/hugetlb.h 2005-03-22 09:41:24.000000000 -0800
@@ -36,7 +36,7 @@ extern const unsigned long hugetlb_zero,
extern int sysctl_hugetlb_shm_group;
#ifndef ARCH_HAS_HUGEPAGE_ONLY_RANGE
-#define is_hugepage_only_range(addr, len) 0
+#define is_hugepage_only_range(mm, addr, len) 0
#define hugetlb_free_pgtables(tlb, prev, start, end) do { } while (0)
#endif
@@ -71,7 +71,7 @@ static inline unsigned long hugetlb_tota
#define is_aligned_hugepage_range(addr, len) 0
#define prepare_hugepage_range(addr, len) (-EINVAL)
#define pmd_huge(x) 0
-#define is_hugepage_only_range(addr, len) 0
+#define is_hugepage_only_range(mm, addr, len) 0
#define hugetlb_free_pgtables(tlb, prev, start, end) do { } while (0)
#define alloc_huge_page() ({ NULL; })
#define free_huge_page(p) ({ (void)(p); BUG(); })
diff -urp linux-2.6.11.orig/mm/mmap.c linux-2.6.11/mm/mmap.c
--- linux-2.6.11.orig/mm/mmap.c 2005-03-21 17:00:35.000000000 -0800
+++ linux-2.6.11/mm/mmap.c 2005-03-21 17:01:20.000000000 -0800
@@ -1334,7 +1334,7 @@ get_unmapped_area(struct file *file, uns
* reserved hugepage range. For some archs like IA-64,
* there is a separate region for hugepages.
*/
- ret = is_hugepage_only_range(addr, len);
+ ret = is_hugepage_only_range(current->mm, addr, len);
}
if (ret)
return -EINVAL;
@@ -1707,7 +1707,7 @@ static void unmap_region(struct mm_struc
unmap_vmas(&tlb, mm, vma, start, end, &nr_accounted, NULL);
vm_unacct_memory(nr_accounted);
- if (is_hugepage_only_range(start, end - start))
+ if (is_hugepage_only_range(mm, start, end - start))
hugetlb_free_pgtables(tlb, prev, start, end);
else
free_pgtables(tlb, prev, start, end);
-
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