Re: v3.4-rc2 out-of-memory problems (was Re: 3.4-rc1 sticks-and-crashs)

[Colin Cross]

On Mon, Apr 9, 2012 at 6:33 PM, David Rientjes <rientjes@xxxxxxxxxx> wrote:
> On Mon, 9 Apr 2012, Colin Cross wrote:
>
>> Before Anton's fix, iterating the tasklist involved taking every task
>> lock, which probably made it very expensive.
>
> I'm not sure of the fix you're referring to, but it's not in 3.4-rc2
> because lowmem_shrink() still does find_lock_task_mm() for every user
> process on the system, which is necessary to safely do get_mm_rss().

I confused "staging: android/lowmemorykiller: Don't grab
tasklist_lock" and "staging: android/lowmemorykiller: Better mm
handling".  You're right, it still grabs the task lock.
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