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From: Andi Kleen <ak@suse.de>
To: Linus Torvalds <torvalds@transmeta.com>
Cc: Andi Kleen <ak@suse.de>,
	Andries.Brouwer@cwi.nl, alan@lxorguk.ukuu.org.uk,
	linux-kernel@vger.kernel.org
Subject: Re: {PATCH} isofs stuff
Date: Thu, 23 Nov 2000 20:57:31 +0100	[thread overview]
Message-ID: <20001123205731.A26914@gruyere.muc.suse.de> (raw)
In-Reply-To: <20001123164436.A17631@gruyere.muc.suse.de> <Pine.LNX.4.10.10011230825380.7992-100000@penguin.transmeta.com>
In-Reply-To: <Pine.LNX.4.10.10011230825380.7992-100000@penguin.transmeta.com>; from torvalds@transmeta.com on Thu, Nov 23, 2000 at 08:59:46AM -0800

On Thu, Nov 23, 2000 at 08:59:46AM -0800, Linus Torvalds wrote:
> [ Btw, I noticed that one of my machines _does_ have gcc-2.95.2, so I can
>   look at the isofs code generation myself.  I don't see anything obvious,
>   and the code is hairy. The differences between 2.91.66 and 2.95.2 are
>   big enough that a plain "diff" doesn't show anything clear. Andi, what
>   does your test-case look like? ]

Just a variable width shift of long long with both arguments fetched
from deep indirection via pointers, and that all in a function with
register pressure (extracted from the XFS source, which does all kinds
of nasty things with long long) 

I am actually not sure if the normal kernel contains even a variable
width long long shift.

-Andi (who also sees some strange hangs in 2.4.0test11-pre, but more
suspects his own hacks. no fs corruption, but I do not run dbench normally) 

-
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  parent reply	other threads:[~2000-11-23 20:27 UTC|newest]

Thread overview: 11+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2000-11-23  3:50 {PATCH} isofs stuff Andries.Brouwer
2000-11-23 15:37 ` Linus Torvalds
2000-11-23 15:44   ` Andi Kleen
     [not found]     ` <Pine.LNX.4.10.10011230825380.7992-100000@penguin.transmeta.com>
2000-11-23 17:39       ` Tigran Aivazian
2000-11-23 19:57       ` Andi Kleen [this message]
2000-11-23 20:38         ` Linus Torvalds
2000-11-23 20:59           ` Matti Aarnio
2000-11-23 21:31             ` Alexander Viro
2000-11-23 16:58 ` Ragnar Hojland Espinosa
2000-11-23 17:20   ` Linus Torvalds
2000-11-23 18:20     ` Ragnar Hojland Espinosa

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