From: Mike Kravetz <mike.kravetz@oracle.com>
To: Michal Hocko <mhocko@suse.com>
Cc: Feng Tang <feng.tang@intel.com>,
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, linux-api@vger.kernel.org,
Andrea Arcangeli <aarcange@redhat.com>,
Mel Gorman <mgorman@techsingularity.net>,
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 v6 4/6] mm/hugetlb: add support for mempolicy MPOL_PREFERRED_MANY
Date: Thu, 22 Jul 2021 09:21:00 -0700 [thread overview]
Message-ID: <1bf315a3-5953-93ac-7bab-ff1328ee46e1@oracle.com> (raw)
In-Reply-To: <YPk9hTQ5KQCv7KFw@dhcp22.suse.cz>
On 7/22/21 2:42 AM, Michal Hocko wrote:
> On Wed 21-07-21 13:49:15, Mike Kravetz wrote:
>> On 7/12/21 1:09 AM, Feng Tang wrote:
> [...]
>>> +#ifdef CONFIG_NUMA
>>> + if (mpol->mode == MPOL_PREFERRED_MANY) {
>>> + gfp_t gfp = (gfp_mask | __GFP_NOWARN) & ~__GFP_DIRECT_RECLAIM;
>>
>> I believe __GFP_NOWARN will be added later in alloc_buddy_huge_page, so
>> no need to add here?
>
> The mask is manipulated here anyway and the __GFP_NOWARN is really
> telling that there is no need to report the failure for _this_
> allocation request. alloc_surplus_huge_page might alter that in whatever
> way in the future. So I would keep NOWARN here for the code clarity
> rather than rely on some implicit assumption down the path.
Makes sense. Better to leave the __GFP_NOWARN here for clarity.
--
Mike Kravetz
next prev parent reply other threads:[~2021-07-22 16:21 UTC|newest]
Thread overview: 38+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-07-12 8:09 [PATCH v6 0/6] Introduce multi-preference mempolicy Feng Tang
2021-07-12 8:09 ` [PATCH v6 1/6] mm/mempolicy: Add MPOL_PREFERRED_MANY for multiple preferred nodes Feng Tang
2021-07-28 12:31 ` Michal Hocko
2021-07-28 14:11 ` Feng Tang
2021-07-28 16:12 ` Michal Hocko
2021-07-29 7:09 ` Feng Tang
2021-07-29 13:38 ` Michal Hocko
2021-07-29 15:12 ` Feng Tang
2021-07-29 16:21 ` Michal Hocko
2021-07-30 3:05 ` Feng Tang
2021-07-30 6:36 ` Michal Hocko
2021-07-30 7:18 ` Feng Tang
2021-07-30 7:38 ` Michal Hocko
2021-08-02 8:11 ` Feng Tang
2021-08-02 11:14 ` Michal Hocko
2021-08-02 11:33 ` Feng Tang
2021-08-02 11:47 ` Michal Hocko
2021-07-12 8:09 ` [PATCH v6 2/6] mm/memplicy: add page allocation function for MPOL_PREFERRED_MANY policy Feng Tang
2021-07-28 12:42 ` Michal Hocko
2021-07-28 15:18 ` Feng Tang
2021-07-28 15:25 ` Feng Tang
2021-07-28 16:15 ` Michal Hocko
2021-07-28 16:14 ` Michal Hocko
2021-07-12 8:09 ` [PATCH v6 3/6] mm/mempolicy: enable page allocation for MPOL_PREFERRED_MANY for general cases Feng Tang
2021-07-12 8:09 ` [PATCH v6 4/6] mm/hugetlb: add support for mempolicy MPOL_PREFERRED_MANY Feng Tang
2021-07-21 20:49 ` Mike Kravetz
2021-07-22 8:11 ` Feng Tang
2021-07-22 9:42 ` Michal Hocko
2021-07-22 16:21 ` Mike Kravetz [this message]
2021-07-12 8:09 ` [PATCH v6 5/6] mm/mempolicy: Advertise new MPOL_PREFERRED_MANY Feng Tang
2021-07-28 12:47 ` Michal Hocko
2021-07-28 13:41 ` Feng Tang
2021-07-12 8:09 ` [PATCH v6 6/6] mm/mempolicy: unify the create() func for bind/interleave/prefer-many policies Feng Tang
2021-07-28 12:51 ` Michal Hocko
2021-07-28 13:50 ` Feng Tang
2021-07-15 0:15 ` [PATCH v6 0/6] Introduce multi-preference mempolicy Andrew Morton
2021-07-15 2:13 ` Feng Tang
2021-07-15 18:49 ` Dave Hansen
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