From: Benjamin Herrenschmidt <benh@kernel.crashing.org>
To: Balbir Singh <bsingharora@gmail.com>,
Anton Blanchard <anton@ozlabs.org>,
paulus@samba.org, mpe@ellerman.id.au, npiggin@gmail.com,
cyrilbur@gmail.com
Cc: linuxppc-dev@lists.ozlabs.org,
"Aneesh Kumar K.V" <aneesh.kumar@linux.vnet.ibm.com>
Subject: Re: [PATCH] powerpc: During context switch, check before setting mm_cpumask
Date: Tue, 04 Oct 2016 10:58:14 +1100 [thread overview]
Message-ID: <1475539094.3784.113.camel@kernel.crashing.org> (raw)
In-Reply-To: <b0537503-e415-ec23-f2c9-88d18209473e@gmail.com>
On Tue, 2016-10-04 at 10:25 +1100, Balbir Singh wrote:
> I think this makes sense, in fact I think in the longer term we can
> even use __set_bit() reorder-able version since we have a sync
> coming out of schedule(). The read side for TLB flush can use a RMB
No, that wouldn't be atomic vs. other threads accessing the same
bitmap.
Ben.
next prev parent reply other threads:[~2016-10-03 23:58 UTC|newest]
Thread overview: 5+ messages / expand[flat|nested] mbox.gz Atom feed top
2016-10-03 6:40 [PATCH] powerpc: During context switch, check before setting mm_cpumask Anton Blanchard
2016-10-03 23:25 ` Balbir Singh
2016-10-03 23:58 ` Benjamin Herrenschmidt [this message]
2016-10-04 0:20 ` Balbir Singh
2016-10-05 2:36 ` Michael Ellerman
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