Messages in this thread | | | Date | Thu, 26 Jul 2018 15:11:18 -0700 | From | Andrew Morton <> | Subject | Re: [PATCH] [PATCH] mm: disable preemption before swapcache_free |
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On Thu, 26 Jul 2018 15:03:23 +0800 "zhaowuyun@wingtech.com" <zhaowuyun@wingtech.com> wrote:
> >On Thu 26-07-18 10:21:40, zhaowuyun@wingtech.com wrote: > >[...] > >> Our project really needs a fix to this issue > > > >Could you be more specific why? My understanding is that RT tasks > >usually have all the memory mlocked otherwise all the real time > >expectations are gone already. > >-- > >Michal Hocko > >SUSE Labs > > > The RT thread is created by a process with normal priority, and the process was sleep, > then some task needs the RT thread to do something, so the process create this thread, and set it to RT policy. > I think that is the reason why RT task would read the swap.
A simpler bandaid might be to replace the cond_resched() with msleep(1).
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