diff options
author | Hugh Dickins <hugh.dickins@tiscali.co.uk> | 2009-09-21 20:02:28 -0400 |
---|---|---|
committer | Linus Torvalds <torvalds@linux-foundation.org> | 2009-09-22 10:17:33 -0400 |
commit | 7103ad323b1ae32bedc3267402117e2f8b45e48d (patch) | |
tree | d4255fceb827cc0a70b5a748182766d22934dc78 | |
parent | 35451beecbd7c86ce3249d543594517a5fe9a0cd (diff) |
ksm: mremap use err from ksm_madvise
mremap move's use of ksm_madvise() was assuming -ENOMEM on failure,
because ksm_madvise used to say -EAGAIN for that; but ksm_madvise now says
-ENOMEM (letting madvise convert that to -EAGAIN), and can also say
-ERESTARTSYS when signalled: so pass the error from ksm_madvise.
Signed-off-by: Hugh Dickins <hugh.dickins@tiscali.co.uk>
Acked-by: Izik Eidus <ieidus@redhat.com>
Cc: Andrea Arcangeli <aarcange@redhat.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
-rw-r--r-- | mm/mremap.c | 8 |
1 files changed, 5 insertions, 3 deletions
diff --git a/mm/mremap.c b/mm/mremap.c index 93adddecf978..20a07dba6be0 100644 --- a/mm/mremap.c +++ b/mm/mremap.c | |||
@@ -175,6 +175,7 @@ static unsigned long move_vma(struct vm_area_struct *vma, | |||
175 | unsigned long excess = 0; | 175 | unsigned long excess = 0; |
176 | unsigned long hiwater_vm; | 176 | unsigned long hiwater_vm; |
177 | int split = 0; | 177 | int split = 0; |
178 | int err; | ||
178 | 179 | ||
179 | /* | 180 | /* |
180 | * We'd prefer to avoid failure later on in do_munmap: | 181 | * We'd prefer to avoid failure later on in do_munmap: |
@@ -190,9 +191,10 @@ static unsigned long move_vma(struct vm_area_struct *vma, | |||
190 | * pages recently unmapped. But leave vma->vm_flags as it was, | 191 | * pages recently unmapped. But leave vma->vm_flags as it was, |
191 | * so KSM can come around to merge on vma and new_vma afterwards. | 192 | * so KSM can come around to merge on vma and new_vma afterwards. |
192 | */ | 193 | */ |
193 | if (ksm_madvise(vma, old_addr, old_addr + old_len, | 194 | err = ksm_madvise(vma, old_addr, old_addr + old_len, |
194 | MADV_UNMERGEABLE, &vm_flags)) | 195 | MADV_UNMERGEABLE, &vm_flags); |
195 | return -ENOMEM; | 196 | if (err) |
197 | return err; | ||
196 | 198 | ||
197 | new_pgoff = vma->vm_pgoff + ((old_addr - vma->vm_start) >> PAGE_SHIFT); | 199 | new_pgoff = vma->vm_pgoff + ((old_addr - vma->vm_start) >> PAGE_SHIFT); |
198 | new_vma = copy_vma(&vma, new_addr, new_len, new_pgoff); | 200 | new_vma = copy_vma(&vma, new_addr, new_len, new_pgoff); |