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Re: Apparent kernel bug with GDB on ppc405

From: Daniel Jacobowitz <drow at false dot org>
To: Matt Mackall <mpm at selenic dot com>
Cc: Grant Likely <grant dot likely at secretlab dot ca>, linuxppc-embedded at ozlabs dot org, gdb at sourceware dot org
Date: Wed, 24 Oct 2007 18:41:30 -0400
Subject: Re: Apparent kernel bug with GDB on ppc405
References: <20071024194640.GB19691@waste.org> <fa686aa40710241328x77435cc1lf09cac730b0ce5ac@mail.gmail.com> <20071024204215.GC19691@waste.org> <20071024215421.GF19691@waste.org> <fa686aa40710241527j1a316760lf36d512eb625810f@mail.gmail.com> <20071024223250.GI19691@waste.org>

On Wed, Oct 24, 2007 at 05:32:50PM -0500, Matt Mackall wrote:
> Not completely implausible, but a) why isn't this seen on basically
> every machine with software TLB? b) why does -local- GDB, which is
> presumably doing much less work than gdbserver + network stack, not fail?

You said it yourself.  Local gdb does more work -> blows through more
TLB entries.

I can't answer you about the other half, but I'm pretty sure TLB
invalidation is already supposed to be happening... somewhere.

-- 
Daniel Jacobowitz
CodeSourcery

Follow-Ups:
- Re: Apparent kernel bug with GDB on ppc405
  - From: Benjamin Herrenschmidt

References:
- Apparent kernel bug with GDB on ppc405
  - From: Matt Mackall
- Re: Apparent kernel bug with GDB on ppc405
  - From: Grant Likely
- Re: Apparent kernel bug with GDB on ppc405
  - From: Matt Mackall
- Re: Apparent kernel bug with GDB on ppc405
  - From: Matt Mackall
- Re: Apparent kernel bug with GDB on ppc405
  - From: Grant Likely
- Re: Apparent kernel bug with GDB on ppc405
  - From: Matt Mackall

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