From: Benjamin Herrenschmidt <benh@kernel.crashing.org>
To: Daniel Jacobowitz <drow@false.org>
Cc: gdb@sourceware.org, linuxppc-embedded@ozlabs.org,
Matt Mackall <mpm@selenic.com>
Subject: Re: Apparent kernel bug with GDB on ppc405
Date: Fri, 26 Oct 2007 11:51:22 +1000 [thread overview]
Message-ID: <1193363482.7018.41.camel@pasglop> (raw)
In-Reply-To: <20071024224130.GA30819@caradoc.them.org>
On Wed, 2007-10-24 at 18:41 -0400, Daniel Jacobowitz wrote:
> 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.
Yes. do_wp_page() -> ptep_clear_flush() -> flush_tlb_page()
Ben.
next prev parent reply other threads:[~2007-10-26 1:51 UTC|newest]
Thread overview: 27+ messages / expand[flat|nested] mbox.gz Atom feed top
2007-10-24 19:46 Apparent kernel bug with GDB on ppc405 Matt Mackall
2007-10-24 20:28 ` Grant Likely
2007-10-24 20:42 ` Matt Mackall
2007-10-24 20:46 ` Grant Likely
2007-10-24 21:54 ` Matt Mackall
2007-10-24 22:27 ` Grant Likely
2007-10-24 22:32 ` Matt Mackall
2007-10-24 22:39 ` Grant Likely
2007-10-24 22:40 ` Grant Likely
2007-10-26 1:50 ` Benjamin Herrenschmidt
2007-10-24 22:41 ` Daniel Jacobowitz
2007-10-26 1:51 ` Benjamin Herrenschmidt [this message]
2007-10-26 20:41 ` Josh Boyer
2007-10-27 1:36 ` Benjamin Herrenschmidt
2007-10-27 1:27 ` Josh Boyer
2007-10-24 20:34 ` David Daney
2007-10-26 1:52 ` Benjamin Herrenschmidt
2007-10-26 1:46 ` Benjamin Herrenschmidt
2007-10-26 2:45 ` Grant Likely
2007-10-26 3:23 ` Benjamin Herrenschmidt
2007-10-26 14:41 ` Matt Mackall
2007-10-27 1:30 ` Benjamin Herrenschmidt
2007-10-27 7:32 ` [PATCH/RFC] powerpc: Pass PID argument to _tlbie (WAS: Apparent kernel bug with GDB on ppc405) Benjamin Herrenschmidt
2007-10-29 12:08 ` Josh Boyer
2007-10-29 20:15 ` Josh Boyer
2007-10-29 20:35 ` Benjamin Herrenschmidt
2007-10-29 21:13 ` Matt Mackall
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