The following reply was made to PR port-alpha/26383; it has been noted by GNATS.

From: Jason R Thorpe <thorpej@netbsd.org>
To: gnats-bugs@netbsd.org
Cc: 
Subject: PR/26383 CVS commit: src/sys/arch/alpha
Date: Thu, 28 Jul 2005 13:57:06 +0000 (UTC)

 Module Name:	src
 Committed By:	thorpej
 Date:		Thu Jul 28 13:57:06 UTC 2005
 
 Modified Files:
 	src/sys/arch/alpha/alpha: machdep.c trap.c
 	src/sys/arch/alpha/include: pcb.h
 
 Log Message:
 - Change FPCPU_LOCK() such that the caller is responsible for blocking
   IPIs in the MULTIPROCESSOR case.  Adjust all callers.
 - In fpusave_cpu(), block IPIs for the entire duration (while we have
   CPUF_FPUSAVE set in ci_flags) to fix the deadlock that leads to
   "panic: fpsave ipi didn't", as described in PR port-alpha/26383.
   Many thanks to Michael Hitch for the analysis and initial patch which
   this one is derived from.
 
 
 To generate a diff of this commit:
 cvs rdiff -r1.286 -r1.287 src/sys/arch/alpha/alpha/machdep.c
 cvs rdiff -r1.97 -r1.98 src/sys/arch/alpha/alpha/trap.c
 cvs rdiff -r1.12 -r1.13 src/sys/arch/alpha/include/pcb.h
 
 Please note that diffs are not public domain; they are subject to the
 copyright notices on the relevant files.