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Re: [PATCH] PowerPC thread pointer bias requires powerpc/lowlevelrobustlock.sym
- From: Benjamin Herrenschmidt <benh at kernel dot crashing dot org>
- To: "Ryan S. Arnold" <rsa at us dot ibm dot com>
- Cc: libc-alpha at sourceware dot org, Ben Collins <ben dot collins at ubuntu dot com>, Fabio Massimo Di Nitto <fabbione at ubuntu dot com>, Jeff Bailey <jbailey at ubuntu dot com>, Paul Mackerras <paulus at samba dot org>, Steve Munroe <sjmunroe at us dot ibm dot com>
- Date: Thu, 02 Nov 2006 11:28:16 +1100
- Subject: Re: [PATCH] PowerPC thread pointer bias requires powerpc/lowlevelrobustlock.sym
- References: <1162426488.28331.0.camel@ryanarn-desktop>
On Wed, 2006-11-01 at 18:14 -0600, Ryan S. Arnold wrote:
> I've been sitting on this patch for way too long.
> The TID implementation in the default lowlevelrobustlock.sym is wrong
> for PowerPC. The thread point on PowerPC is biased by -0x7000 to extend
> the size of the FAST TLS to 64KB. This patch provides a powerpc
> implementation to take this into account.
Fabio, Jeff: That should fix the root cause of the errors on 2.6.18 and
later for which my patch corrected the kernel oops (you would still have
gotten an error from the syscall due to that glibc problem).