Re: [PATCH] mm/memcontrol: Disable on PREEMPT_RT

[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]

 



On Fri 10-12-21 16:22:01, Sebastian Andrzej Siewior wrote:
[...]
I am sorry but I didn't get to read and digest the rest of the message
yet. Let me just point out this

> The problematic part here is mem_cgroup_tree_per_node::lock which can
> not be acquired with disabled interrupts on PREEMPT_RT.  The "locking
> scope" is not always clear to me.  Also, if it is _just_ the counter,
> then we might solve this differently.

I do not think you should be losing sleep over soft limit reclaim. This
is certainly not something to be used for RT workloads and rather than
touching that code I think it makes some sense to simply disallow soft
limit with RT enabled (i.e. do not allow to set any soft limit).
-- 
Michal Hocko
SUSE Labs



[Index of Archives]     [Linux ARM Kernel]     [Linux ARM]     [Linux Omap]     [Fedora ARM]     [IETF Annouce]     [Security]     [Bugtraq]     [Linux OMAP]     [Linux MIPS]     [eCos]     [Asterisk Internet PBX]     [Linux API]     [Monitors]

  Powered by Linux