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Date:      Sat, 27 Dec 2008 10:51:11 +0200
From:      Danny Braniss <danny@cs.huji.ac.il>
To:        "Lin Jui-Nan Eric" <ericlin@tamama.org>
Cc:        stable@freebsd.org, Rong-en Fan <grafan@gmail.com>
Subject:   Re: amd(8) cores dump when load high 
Message-ID:  <E1LGUt5-000Jpj-2L@kabab.cs.huji.ac.il>
In-Reply-To: <47713ee10812261117o6f772843o53ec9542bc773141@mail.gmail.com> 
References:  <47713ee10812220844r7889d286l3a98f294d780ccc0@mail.gmail.com>  <6eb82e0812260202m1d8816c5mc7b0991514f83853@mail.gmail.com>  <47713ee10812261117o6f772843o53ec9542bc773141@mail.gmail.com>

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> Yes, we found that it crashes when swap is used.

on an amd64 architecture, amd could not plock it's pages in memory, and would,
under memory preasure be swapped out, and break.
I just run some tests under 7.1-PRERELEASE, and
- it seems that plock is working.
- amd is not being swapped out.
are you running with amd -S ?
	danny

> 
> 
> On Fri, Dec 26, 2008 at 6:02 PM, Rong-en Fan <grafan@gmail.com> wrote:
> > On Tue, Dec 23, 2008 at 12:44 AM, Lin Jui-Nan Eric <ericlin@tamama.org> wrote:
> >> Dear listers,
> >>
> >> We currently found that amd frequently cores dump while loading is
> >> high (about 4~5) after we upgrade world & kernel from 7.0-RELEASE to
> >> 7.1-PRERELEASE.
> >>
> >> I have read -stable and svn log of 7-STABLE, but can not found a
> >> report or a solution. Did anyone have the same issue? Thank you very
> >> much.
> >>
> >
> > According to my previous experience, amd 6.1.5 crashes
> > under low memory situations. Not necessary high load.
> >
> > Regards,
> > Rong-En Fan
> >
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