linux-kernel.vger.kernel.org archive mirror
 help / color / mirror / Atom feed
From: Michal Hocko <mhocko@kernel.org>
To: Anshuman Khandual <anshuman.khandual@arm.com>
Cc: linux-mm@kvack.org, linux-arm-kernel@lists.infradead.org,
	linux-kernel@vger.kernel.org, suzuki.poulose@arm.com,
	punit.agrawal@arm.com, will.deacon@arm.com, Steven.Price@arm.com,
	steve.capper@arm.com, catalin.marinas@arm.com,
	akpm@linux-foundation.org, mike.kravetz@oracle.com,
	n-horiguchi@ah.jp.nec.com
Subject: Re: [PATCH V3 3/5] mm/hugetlb: Enable arch specific huge page size support for migration
Date: Wed, 24 Oct 2018 15:58:59 +0200	[thread overview]
Message-ID: <20181024135859.GI18839@dhcp22.suse.cz> (raw)
In-Reply-To: <20181024135639.GH18839@dhcp22.suse.cz>

On Wed 24-10-18 15:56:39, Michal Hocko wrote:
> On Tue 23-10-18 18:31:59, Anshuman Khandual wrote:
> > Architectures like arm64 have HugeTLB page sizes which are different than
> > generic sizes at PMD, PUD, PGD level and implemented via contiguous bits.
> > At present these special size HugeTLB pages cannot be identified through
> > macros like (PMD|PUD|PGDIR)_SHIFT and hence chosen not be migrated.
> > 
> > Enabling migration support for these special HugeTLB page sizes along with
> > the generic ones (PMD|PUD|PGD) would require identifying all of them on a
> > given platform. A platform specific hook can precisely enumerate all huge
> > page sizes supported for migration. Instead of comparing against standard
> > huge page orders let hugetlb_migration_support() function call a platform
> > hook arch_hugetlb_migration_support(). Default definition for the platform
> > hook maintains existing semantics which checks standard huge page order.
> > But an architecture can choose to override the default and provide support
> > for a comprehensive set of huge page sizes.
> > 
> > Reviewed-by: Naoya Horiguchi <n-horiguchi@ah.jp.nec.com>
> > Signed-off-by: Anshuman Khandual <anshuman.khandual@arm.com>
> 
> Acked-by: Michal Hocko <mhocko@use.com>

fat fingers here, should be mhocko@suse.com of course.
-- 
Michal Hocko
SUSE Labs

  reply	other threads:[~2018-10-24 13:59 UTC|newest]

Thread overview: 19+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2018-10-23 13:01 [PATCH V3 0/5] arm64/mm: Enable HugeTLB migration Anshuman Khandual
2018-10-23 13:01 ` [PATCH V3 1/5] mm/hugetlb: Distinguish between migratability and movability Anshuman Khandual
2018-10-24 13:54   ` Michal Hocko
2018-11-08 10:33   ` Steve Capper
2018-10-23 13:01 ` [PATCH V3 2/5] mm/hugetlb: Enable PUD level huge page migration Anshuman Khandual
2018-11-08 10:34   ` Steve Capper
2018-10-23 13:01 ` [PATCH V3 3/5] mm/hugetlb: Enable arch specific huge page size support for migration Anshuman Khandual
2018-10-24 13:56   ` Michal Hocko
2018-10-24 13:58     ` Michal Hocko [this message]
2018-10-25  6:23       ` Anshuman Khandual
2018-10-25  7:45         ` Michal Hocko
2018-11-08 10:35   ` Steve Capper
2018-10-23 13:02 ` [PATCH V3 4/5] arm64/mm: Enable HugeTLB migration Anshuman Khandual
2018-11-08 10:35   ` Steve Capper
2018-11-23 14:42   ` Catalin Marinas
2018-10-23 13:02 ` [PATCH V3 5/5] arm64/mm: Enable HugeTLB migration for contiguous bit HugeTLB pages Anshuman Khandual
2018-11-08 10:36   ` Steve Capper
2018-11-23 14:42   ` Catalin Marinas
2018-11-23 15:08 ` [PATCH V3 0/5] arm64/mm: Enable HugeTLB migration Anshuman Khandual

Reply instructions:

You may reply publicly to this message via plain-text email
using any one of the following methods:

* Save the following mbox file, import it into your mail client,
  and reply-to-all from there: mbox

  Avoid top-posting and favor interleaved quoting:
  https://en.wikipedia.org/wiki/Posting_style#Interleaved_style

* Reply using the --to, --cc, and --in-reply-to
  switches of git-send-email(1):

  git send-email \
    --in-reply-to=20181024135859.GI18839@dhcp22.suse.cz \
    --to=mhocko@kernel.org \
    --cc=Steven.Price@arm.com \
    --cc=akpm@linux-foundation.org \
    --cc=anshuman.khandual@arm.com \
    --cc=catalin.marinas@arm.com \
    --cc=linux-arm-kernel@lists.infradead.org \
    --cc=linux-kernel@vger.kernel.org \
    --cc=linux-mm@kvack.org \
    --cc=mike.kravetz@oracle.com \
    --cc=n-horiguchi@ah.jp.nec.com \
    --cc=punit.agrawal@arm.com \
    --cc=steve.capper@arm.com \
    --cc=suzuki.poulose@arm.com \
    --cc=will.deacon@arm.com \
    /path/to/YOUR_REPLY

  https://kernel.org/pub/software/scm/git/docs/git-send-email.html

* If your mail client supports setting the In-Reply-To header
  via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line before the message body.
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox;
as well as URLs for NNTP newsgroup(s).