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| author |   Linus Torvalds <torvalds@linux-foundation.org> | 2013-08-22 09:13:06 -0700 |
|---|---|---|
| committer | Linus Torvalds <torvalds@linux-foundation.org> | 2013-08-22 10:18:44 -0700 |
| commit | 5ea80f76a56605a190a7ea16846c82aa63dbd0aa (patch) | |
| tree | 99e6547e8bbbcb3187676bb7a002be9d24c6b53e /include/linux | |
| parent | Merge tag 'stable/for-linus-3.11-rc6-tag' of git://git.kernel.org/pub/scm/linux/kernel/git/xen/tip (diff) | |
| download | linux-dev-5ea80f76a56605a190a7ea16846c82aa63dbd0aa.tar.xz linux-dev-5ea80f76a56605a190a7ea16846c82aa63dbd0aa.zip | |
Revert "x86 get_unmapped_area(): use proper mmap base for bottom-up direction"
This reverts commit df54d6fa54275ce59660453e29d1228c2b45a826.
The commit isn't necessarily wrong, but because it recalculates the
random mmap_base every time, it seems to confuse user memory allocators
that expect contiguous mmap allocations even when the mmap address isn't
specified.
In particular, the MATLAB Java runtime seems to be unhappy. See
https://bugzilla.kernel.org/show_bug.cgi?id=60774
So we'll want to apply the random offset only once, and Radu has a patch
for that. Revert this older commit in order to apply the other one.
Reported-by: Jeff Shorey <shoreyjeff@gmail.com>
Cc: Radu Caragea <sinaelgl@gmail.com>
Cc: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'include/linux')
| -rw-r--r-- | include/linux/sched.h | 1 |
1 files changed, 0 insertions, 1 deletions
diff --git a/include/linux/sched.h b/include/linux/sched.h index e9995eb5985c..078066daffd4 100644 --- a/include/linux/sched.h +++ b/include/linux/sched.h @@ -314,7 +314,6 @@ struct nsproxy; struct user_namespace; #ifdef CONFIG_MMU -extern unsigned long mmap_legacy_base(void); extern void arch_pick_mmap_layout(struct mm_struct *mm); extern unsigned long arch_get_unmapped_area(struct file *, unsigned long, unsigned long, |