On Tue, Feb 17, 2015 at 09:33:27AM +0100, Michal Hocko wrote:
> On Tue 17-02-15 14:24:59, Joonsoo Kim wrote:
> > It can be possible to return NULL in parent_mem_cgroup()
> > if use_hierarchy is 0.
>
> This alone is not sufficient because the low limit is present only in
> the unified hierarchy
On Tue, Feb 17, 2015 at 09:33:27AM +0100, Michal Hocko wrote:
On Tue 17-02-15 14:24:59, Joonsoo Kim wrote:
It can be possible to return NULL in parent_mem_cgroup()
if use_hierarchy is 0.
This alone is not sufficient because the low limit is present only in
the unified hierarchy API and
On Tue, Feb 17, 2015 at 09:33:27AM +0100, Michal Hocko wrote:
> On Tue 17-02-15 14:24:59, Joonsoo Kim wrote:
> > It can be possible to return NULL in parent_mem_cgroup()
> > if use_hierarchy is 0.
>
> This alone is not sufficient because the low limit is present only in
> the unified hierarchy
On Tue 17-02-15 14:24:59, Joonsoo Kim wrote:
> It can be possible to return NULL in parent_mem_cgroup()
> if use_hierarchy is 0.
This alone is not sufficient because the low limit is present only in
the unified hierarchy API and there is no use_hierarchy there. The
primary issue here is that the
On Tue 17-02-15 14:24:59, Joonsoo Kim wrote:
It can be possible to return NULL in parent_mem_cgroup()
if use_hierarchy is 0.
This alone is not sufficient because the low limit is present only in
the unified hierarchy API and there is no use_hierarchy there. The
primary issue here is that the
On Tue, Feb 17, 2015 at 09:33:27AM +0100, Michal Hocko wrote:
On Tue 17-02-15 14:24:59, Joonsoo Kim wrote:
It can be possible to return NULL in parent_mem_cgroup()
if use_hierarchy is 0.
This alone is not sufficient because the low limit is present only in
the unified hierarchy API and
It can be possible to return NULL in parent_mem_cgroup()
if use_hierarchy is 0. So, we need to check NULL in the loop on
mem_cgroup_low(). Without it, following NULL pointer dereference happens.
[ 33.607531] BUG: unable to handle kernel NULL pointer dereference at
00b0
[
It can be possible to return NULL in parent_mem_cgroup()
if use_hierarchy is 0. So, we need to check NULL in the loop on
mem_cgroup_low(). Without it, following NULL pointer dereference happens.
[ 33.607531] BUG: unable to handle kernel NULL pointer dereference at
00b0
[
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