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| author |   Konstantin Khlebnikov <koct9i@gmail.com> | 2016-05-20 16:57:45 -0700 |
|---|---|---|
| committer |   Linus Torvalds <torvalds@linux-foundation.org> | 2016-05-20 17:58:30 -0700 |
| commit | f4fcd55841fc9e46daac553b39361572453c2b88 (patch) | |
| tree | 56d0e92a579868fe7074df81b177889969a5fade /fs/ramfs | |
| parent | mm: fix incorrect pfn passed to untrack_pfn() in remap_pfn_range() (diff) | |
| download | linux-dev-f4fcd55841fc9e46daac553b39361572453c2b88.tar.xz linux-dev-f4fcd55841fc9e46daac553b39361572453c2b88.zip | |
mm: enable RLIMIT_DATA by default with workaround for valgrind
Since commit 84638335900f ("mm: rework virtual memory accounting")
RLIMIT_DATA limits both brk() and private mmap() but this's disabled by
default because of incompatibility with older versions of valgrind.
Valgrind always set limit to zero and fails if RLIMIT_DATA is enabled.
Fortunately it changes only rlim_cur and keeps rlim_max for reverting
limit back when needed.
This patch checks current usage also against rlim_max if rlim_cur is
zero. This is safe because task anyway can increase rlim_cur up to
rlim_max. Size of brk is still checked against rlim_cur, so this part
is completely compatible - zero rlim_cur forbids brk() but allows
private mmap().
Link: http://lkml.kernel.org/r/56A28613.5070104@de.ibm.com
Signed-off-by: Konstantin Khlebnikov <koct9i@gmail.com>
Acked-by: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Cyrill Gorcunov <gorcunov@openvz.org>
Cc: Christian Borntraeger <borntraeger@de.ibm.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'fs/ramfs')
0 files changed, 0 insertions, 0 deletions