From: Ingo Molnar <mingo@elte.hu>
To: Jan Beulich <jbeulich@novell.com>
Cc: Andrew Morton <akpm@osdl.org>, Andi Kleen <ak@suse.de>,
Thomas Gleixner <tglx@linutronix.de>,
linux-kernel@vger.kernel.org
Subject: Re: [PATCH] Re: UNWIND_INFO slowdown in -mm1
Date: Wed, 18 Oct 2006 10:45:02 +0200 [thread overview]
Message-ID: <20061018084502.GA13618@elte.hu> (raw)
In-Reply-To: <45351782.76E4.0078.0@novell.com>
* Jan Beulich <jbeulich@novell.com> wrote:
> >in 2.6.18-mm1 we are seeing _really_ long delays in the unwind code.
> >(full trace attached) On an Athlon64 3800+ CPU:
>
> Below patch should help, can you try it out? Short of the linker
> supporting building a binary lookup table at build time, it creates
> one as soon as the bootmem allocator is usable (so you'll continue
> using the linear lookup for the first [hopefully] few calls). The code
> should be ready to utilize a build-time created table once a fixed
> linker becomes available.
i tried this ontop of -git and it builds and boots fine, and the bootup
speed problems seem to be gone. Thanks!
> Signed-off-by: Jan Beulich <jbeulich@novell.com>
Acked-by: Ingo Molnar <mingo@elte.hu>
Ingo
next prev parent reply other threads:[~2006-10-18 8:52 UTC|newest]
Thread overview: 6+ messages / expand[flat|nested] mbox.gz Atom feed top
[not found] <20060928192048.GA17436@elte.hu>
2006-10-17 15:48 ` Jan Beulich
2006-10-18 8:45 ` Ingo Molnar [this message]
2006-10-18 10:50 ` Andi Kleen
2006-10-18 11:01 ` Ingo Molnar
2006-11-16 17:16 ` -rc6, "DWARF2 unwinder stuck at" Ingo Molnar
2006-11-17 4:57 ` [patch] x86_64: stack unwinder crash fix Ingo Molnar
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