From: Nathan Lynch <nathanl@linux.ibm.com>
To: Gautham R Shenoy <ego.lkml@gmail.com>
Cc: ego@linux.vnet.ibm.com, linuxppc-dev <linuxppc-dev@lists.ozlabs.org>
Subject: Re: [PATCH v2 2/3] powerpc/rtas: allow rescheduling while changing cpu states
Date: Tue, 13 Aug 2019 13:14:09 -0500 [thread overview]
Message-ID: <87zhkdrkzy.fsf@linux.ibm.com> (raw)
In-Reply-To: <CAHZ_5WyBjss+C2rY_zhr_BDFHEDNOq7-3T6um38uVj-Tj6jHtA@mail.gmail.com>
Gautham R Shenoy <ego.lkml@gmail.com> writes:
> On Sat, Aug 3, 2019 at 1:03 AM Nathan Lynch <nathanl@linux.ibm.com> wrote:
>>
>> rtas_cpu_state_change_mask() potentially operates on scores of cpus,
>> so explicitly allow rescheduling in the loop body.
>>
>
> Are we seeing softlockups/rcu stalls while running this ?
I have not seen a report yet, but since the loop is bound only by the
number of processors in the LPAR I suspect it's only a matter of time.
> Reviewed-by: Gautham R. Shenoy <ego@linux.vnet.ibm.com>
Thanks!
next prev parent reply other threads:[~2019-08-13 18:16 UTC|newest]
Thread overview: 10+ messages / expand[flat|nested] mbox.gz Atom feed top
2019-08-02 19:29 [PATCH v2 0/3] more migration vs CPU hotplug fixes etc Nathan Lynch
2019-08-02 19:29 ` [PATCH v2 1/3] powerpc/rtas: use device model APIs and serialization during LPM Nathan Lynch
2019-08-05 23:05 ` Tyrel Datwyler
2019-08-12 16:55 ` Nathan Lynch
2019-08-13 17:20 ` Gautham R Shenoy
2019-08-22 13:08 ` Michael Ellerman
2019-08-02 19:29 ` [PATCH v2 2/3] powerpc/rtas: allow rescheduling while changing cpu states Nathan Lynch
2019-08-13 17:17 ` Gautham R Shenoy
2019-08-13 18:14 ` Nathan Lynch [this message]
2019-08-02 19:29 ` [PATCH v2 3/3] powerpc/pseries/mobility: use cond_resched when updating device tree Nathan Lynch
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