Date: Thu, 25 Dec 2003 14:38:42 +0800 From: "=?gb2312?B?WGluIExJL8Du9s4=?=" <delphij@frontfree.net> To: <stable@FreeBSD.org>, <current@freebsd.org> Subject: [SOLVED] RE: [Backtrace] 4.9 and 5.1-RELEASE occasionly panic on RAM > 4GB without PAE (long) Message-ID: <20031225063847.4271852E1@ftp.bjpu.edu.cn> In-Reply-To: <20031217165012.K15803@carver.gumbysoft.com>
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First I would say "thank you" to those who helped me to find the cause of the problem. Now I have confirmed that the problem goes away after a kernel configuration tuning. To trigger the problem, the box must have more than 2GB RAM and the following configuration: options MAXDSIZ=(1024UL*1024*1024) options MAXSSIZ=(128UL*1024*1024) options DFLDSIZ=(1024UL*1024*1024) A default, say, GENERIC kernel would not trigger panic's during my test. The problem exists on 4-STABLE and 5-CURRENT, however, by increasing kernel virtual address space by adding a line like the following: options KVA_PAGES=512 The panics goes away. I would suggest the following patch against -HEAD to be applied: Index: NOTES =================================================================== RCS file: /home/ncvs/src/sys/conf/NOTES,v retrieving revision 1.1192 diff -u -r1.1192 NOTES --- NOTES 7 Dec 2003 04:41:11 -0000 1.1192 +++ NOTES 25 Dec 2003 06:36:27 -0000 @@ -89,6 +89,12 @@ # and explicitly set the maximum with a shell command for processes # that regularly exceed the limit like INND. # +# Adjusting these parameters may result in a larger kernel memory +# usage. Thus you may want to enlarge kernel virtual address space. +# On a i386 box with more than 2GB of memory and the following +# options, KVA_PAGES=512 would be helpful to solve some fork related +# kernel panics. +# options MAXDSIZ=(1024UL*1024*1024) options MAXSSIZ=(128UL*1024*1024) options DFLDSIZ=(1024UL*1024*1024) Thank you again for your help!
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