linux-kernel - Re: [RFC V2] mm/vmstat: Add events for HugeTLB migration

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Message-ID: <20200930103331.GA30472@linux>
Date:   Wed, 30 Sep 2020 12:33:36 +0200
From:   Oscar Salvador <osalvador@...e.de>
To:     Anshuman Khandual <anshuman.khandual@....com>
Cc:     linux-mm@...ck.org, Daniel Jordan <daniel.m.jordan@...cle.com>,
        Zi Yan <ziy@...dia.com>, John Hubbard <jhubbard@...dia.com>,
        Mike Kravetz <mike.kravetz@...cle.com>,
        Andrew Morton <akpm@...ux-foundation.org>,
        linux-kernel@...r.kernel.org
Subject: Re: [RFC V2] mm/vmstat: Add events for HugeTLB migration

On Wed, Sep 30, 2020 at 03:32:10PM +0530, Anshuman Khandual wrote:
> Right, it would be simple. But as Mike had mentioned before PageHuge()
> check is more expensive than PageTransHuge(). This proposal just tries
> not to call PageHuge() unless the page first clears PageTransHuge(),
> saving some potential CPU cycles on normal pages.

Ah, I remember now.
I missed that, sorry.

-- 
Oscar Salvador
SUSE L3