linux-kernel - Re: Easy portable testcase! (Re: Kernel falls apart under light memory pressure (i.e. linking vmlinux))

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]

Date:	Tue, 14 Jun 2011 12:10:47 +0200
From:	Johannes Weiner <hannes@...xchg.org>
To:	Andrew Lutomirski <luto@....edu>
Cc:	Minchan Kim <minchan.kim@...il.com>, mgorman@...e.de,
	KOSAKI Motohiro <kosaki.motohiro@...fujitsu.com>,
	aarcange@...hat.com, kamezawa.hiroyu@...fujitsu.com,
	fengguang.wu@...el.com, andi@...stfloor.org, linux-mm@...ck.org,
	linux-kernel@...r.kernel.org, riel@...hat.com
Subject: Re: Easy portable testcase! (Re: Kernel falls apart under light
 memory pressure (i.e. linking vmlinux))

On Sun, May 29, 2011 at 08:28:46PM -0400, Andrew Lutomirski wrote:
> On Sun, May 29, 2011 at 2:28 PM, Minchan Kim <minchan.kim@...il.com> wrote:
> >>
> >> It works only if the zone meets high watermark. If allocation is
> >> faster than reclaim(ie, it's true for slow swap device), the zone
> >> would remain congested.
> >> It means swapout would block.
> >> As we see the OOM log, we can know that DMA32 zone can't meet high watermark.
> >>
> >> Does my guessing make sense?
> >
> > Hi Andrew.
> > I got failed your scenario in my machine so could you be willing to
> > test this patch for proving my above scenario?
> > The patch is just revert patch of 0e093d99[do not sleep on the
> > congestion queue...] for 2.6.38.6.
> > I would like to test it for proving my above zone congestion scenario.
> >
> > I did it based on 2.6.38.6 for your easy apply so you must apply it
> > cleanly on vanilla v2.6.38.6.
> > And you have to add !pgdat_balanced and shrink_slab patch.
> 
> No, because my laptop just decided that it doesn't like to turn on. :(
> 
> I'll test it on my VM on Tuesday and (fingers crossed) on my repaired
> laptop next weekend.

Any updates on this?
--
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/