Date: Sun, 11 Nov 2007 22:43:22 +0200 From: Alexander Motin <mav@FreeBSD.org> To: Marcel Moolenaar <xcllnt@mac.com> Cc: Kostik Belousov <kostikbel@gmail.com>, Julian Elischer <julian@elischer.org>, freebsd-arch@freebsd.org Subject: Re: Kernel thread stack usage Message-ID: <4737696A.7050605@FreeBSD.org> In-Reply-To: <0414590D-0C2A-4EBD-9617-7AC193ABD1E8@mac.com> References: <1191187393.00807485.1191175801@10.7.7.3> <1191189248.00807488.1191177603@10.7.7.3> <4736D8AF.7010209@FreeBSD.org> <20071111163815.GJ37471@deviant.kiev.zoral.com.ua> <47373C5E.2080800@elischer.org> <0414590D-0C2A-4EBD-9617-7AC193ABD1E8@mac.com>
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Marcel Moolenaar wrote: > This is not theoretical at all: On ia64 there are 2 stacks. One > growing down and one growing up. The downward stack is used for > stack-based variables and the pward growing stack is used by > the processor for stacked registers. Hmm, interesting. And which one is pointed by td_kstack there? Or they are using same segment but from opposite sides? > The code suggested will not be meaningful on ia64. Why? If variable stack growing down and it's segment is pointed by td_kstack then where is the problem? Or you mean that system will die earlier when those two stacks in same segment will reach each other? -- Alexander Motin
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