Date: Sat, 24 Oct 2009 20:28:42 +0000 (UTC) From: Marcel Moolenaar <marcel@FreeBSD.org> To: src-committers@freebsd.org, svn-src-all@freebsd.org, svn-src-head@freebsd.org Subject: svn commit: r198451 - head/sys/ia64/include Message-ID: <200910242028.n9OKSg2u010197@svn.freebsd.org>
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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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