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A 32KB kernel stack is not quite enough. The new USB stack is a bit

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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.
This commit is contained in:
Marcel Moolenaar 2009-10-24 20:28:42 +00:00
parent 3b43a26b50
commit b475d22d67
Notes: svn2git 2020-12-20 02:59:44 +00:00 
svn path=/head/; revision=198451
1 changed files with 1 additions and 1 deletions
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2
sys/ia64/include/param.h
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@ -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 */