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From: Michal Hocko <mhocko@suse.com>
To: Feng Tang <feng.tang@intel.com>
Cc: linux-mm@kvack.org, Andrew Morton <akpm@linux-foundation.org>,
	David Rientjes <rientjes@google.com>,
	Dave Hansen <dave.hansen@intel.com>,
	Ben Widawsky <ben.widawsky@intel.com>,
	linux-kernel@vger.kernel.org,
	Andrea Arcangeli <aarcange@redhat.com>,
	Mel Gorman <mgorman@techsingularity.net>,
	Mike Kravetz <mike.kravetz@oracle.com>,
	Randy Dunlap <rdunlap@infradead.org>,
	Vlastimil Babka <vbabka@suse.cz>, Andi Kleen <ak@linux.intel.com>,
	Dan Williams <dan.j.williams@intel.com>,
	ying.huang@intel.com
Subject: Re: [PATCH v1 4/4] mm/mempolicy: kill MPOL_F_LOCAL bit
Date: Mon, 31 May 2021 10:22:51 +0200	[thread overview]
Message-ID: <YLSc2zzr1g+CTiAY@dhcp22.suse.cz> (raw)
In-Reply-To: <20210531073252.GC56979@shbuild999.sh.intel.com>

On Mon 31-05-21 15:32:52, Feng Tang wrote:
> On Mon, May 31, 2021 at 09:00:25AM +0200, Michal Hocko wrote:
[...]
> > I can see you have posted a newer version which I haven't seen yet but
> > this is really better to get resolved before building up more on top.
> > And let me be explicit. I do believe that rebinding preferred policy is
> > just bogus and it should be dropped altogether on the ground that a 
> > preference is a mere hint from userspace where to start the allocation. 
> 
> Yes, the current mpol_rebind_preferred()'s logic is confusing. Let me
> try to understand it correctly, are you suggesting to do nothing for
> 'prefer's rebinding regarding MPOL_F_STATIC_NODES and MPOL_F_RELATIVE_NODES,
> while just setting 'pol->w.cpuset_mems_allowed' to the new nodemask?

yes this is exactly what I've had in mind.

-- 
Michal Hocko
SUSE Labs


  reply	other threads:[~2021-05-31  8:22 UTC|newest]

Thread overview: 24+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2021-05-26  5:01 [PATCH v1 0/4] mm/mempolicy: some fix and semantics cleanup Feng Tang
2021-05-26  5:01 ` [PATCH v1 1/4] mm/mempolicy: skip nodemask intersect check for 'interleave' when oom Feng Tang
2021-05-27  7:30   ` Michal Hocko
2021-05-27 13:05     ` Feng Tang
2021-05-27 13:15       ` Michal Hocko
2021-05-27 13:22         ` Feng Tang
2021-05-26  5:01 ` [PATCH v1 2/4] mm/mempolicy: unify the preprocessing for mbind and set_mempolicy Feng Tang
2021-05-27  7:39   ` Michal Hocko
2021-05-27 12:31     ` Feng Tang
2021-05-26  5:01 ` [PATCH v1 3/4] mm/mempolicy: don't handle MPOL_LOCAL like a fake MPOL_PREFERRED policy Feng Tang
2021-05-27  8:12   ` Michal Hocko
2021-05-27 12:06     ` Feng Tang
2021-05-27 12:16       ` Michal Hocko
2021-05-26  5:01 ` [PATCH v1 4/4] mm/mempolicy: kill MPOL_F_LOCAL bit Feng Tang
2021-05-27  8:20   ` Michal Hocko
2021-05-27 12:10     ` Feng Tang
2021-05-27 12:26       ` Michal Hocko
2021-05-27 13:34         ` Feng Tang
2021-05-27 15:34           ` Michal Hocko
2021-05-28  4:39             ` Feng Tang
2021-05-31  7:00               ` Michal Hocko
2021-05-31  7:32                 ` Feng Tang
2021-05-31  8:22                   ` Michal Hocko [this message]
2021-05-31  8:29                     ` Feng Tang

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