linux-kernel - Re: [PATCH 2/4] Add replace_page(), change the mapping of pte from one page into another

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] [day] [month] [year] [list]

Date:	Thu, 13 Nov 2008 20:32:47 +0900
From:	KAMEZAWA Hiroyuki <kamezawa.hiroyu@...fujitsu.com>
To:	Izik Eidus <ieidus@...hat.com>
Cc:	Izik Eidus <izik@...ranet.com>, Avi Kivity <avi@...hat.com>,
	Andrea Arcangeli <aarcange@...hat.com>,
	Christoph Lameter <cl@...ux-foundation.org>,
	Andrew Morton <akpm@...ux-foundation.org>,
	linux-kernel@...r.kernel.org, linux-mm@...ck.org,
	kvm@...r.kernel.org, chrisw@...hat.com, izike@...ranet.com
Subject: Re: [PATCH 2/4] Add replace_page(), change the mapping of pte from
 one page into another

On Thu, 13 Nov 2008 12:38:07 +0200
Izik Eidus <ieidus@...hat.com> wrote:
> > If KSM pages are on radix-tree, it will be accounted automatically.
> > Now, we have "Unevictable" LRU and mlocked() pages are smartly isolated into its
> > own LRU. So, just doing
> >
> >  - inode's radix-tree
> >  - make all pages mlocked.
> >  - provide special page fault handler for your purpose
> >   
> 
> Well in this version that i am going to merge the pages arent going to 
> be swappable,
> Latter after Ksm will get merged we will make the KsmPages swappable...
good to hear

> so i think working with cgroups would be effective / useful only when 
> KsmPages will start be swappable...
> Do you agree?
> (What i am saying is that right now lets dont count the KsmPages inside 
> the cgroup, lets do it when KsmPages
> will be swappable)
> 
ok.

> If you feel this pages should be counted in the cgroup i have no problem 
> to do it via hooks like page migration is doing.
> 
> thanks.
> 
> > is simple one. But ok, whatever implementation you'll do, I have to check it
> > and consider whether it should be tracked or not. Then, add codes to memcg to
> > track it or ignore it or comments on your patches ;)
> >
> > It's helpful to add me to CC: when you post this set again.
> >   
> 
> Sure will.
> 

If necessary, I'll have to add "ignore in this case" hook in memcg.
(ex. checking PageKSM flag in memcg.)

If you are sufferred from memcg in your test, cgroup_disable=memory boot option
will allow you to disable memcg.


Thanks,
-Kame








--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@...r.kernel.org
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/