svn commit: r198451 - head/sys/ia64/include
Marcel Moolenaar
marcel at FreeBSD.org
Sat Oct 24 20:28:42 UTC 2009
Author: marcel
Date: Sat Oct 24 20:28:42 2009
New Revision: 198451
URL: http://svn.freebsd.org/changeset/base/198451
Log:
A 32KB kernel stack is not quite enough. The new USB stack is a bit
more stack hungry as compared to the old one that my RX2660 gets
a machine check and spontaneously reboots at the time the USB DVD
drive is found and attached to CAM as a mass storage device. This
doesn't happen always, but definitely varies per kernel build.
Likewise when using a 128-byte printf buffer. The additional 128
bytes that printf needs seems to be enough to have the memory stack
and register stack collide and causing a machine check.
Thus: Bump KSTACK_PAGES from 4 to 5.
Modified:
head/sys/ia64/include/param.h
Modified: head/sys/ia64/include/param.h
==============================================================================
--- head/sys/ia64/include/param.h Sat Oct 24 20:07:17 2009 (r198450)
+++ head/sys/ia64/include/param.h Sat Oct 24 20:28:42 2009 (r198451)
@@ -92,7 +92,7 @@
#define MAXPAGESIZES 1 /* maximum number of supported page sizes */
#ifndef KSTACK_PAGES
-#define KSTACK_PAGES 4 /* pages of kernel stack */
+#define KSTACK_PAGES 5 /* pages of kernel stack */
#endif
#define KSTACK_GUARD_PAGES 0 /* pages of kstack guard; 0 disables */
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