Date: Tue, 23 Nov 2004 15:00:55 -0500 From: John Baldwin <jhb@FreeBSD.org> To: powerpc@FreeBSD.org, amd64@FreeBSD.org, ia64@FreeBSD.org Cc: Robert Watson <rwatson@FreeBSD.org> Subject: Patch to optimize "bare" critical sections Message-ID: <200411231500.55841.jhb@FreeBSD.org>
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Basically, I have a patch to divorce the interrupt disable/deferring to only happen inside of spinlocks using a new spinlock_enter/exit() API (where a spinlock_enter/exit includes a critical section as well) but that plain critical sections won't have to do such a thing. I've tested it on i386, alpha, and sparc64 already, and it has also been tested on arm. I'm unable to get a cross-built powerpc kernel to link (linker dies with a signal 6), but the compile did finish. I have cross-compiled ia64 and amd64 successfully, but have not run tested due to ENOHARDWARE. So, I would appreciate it if a few folks could try the patch out on ppc, ia64, and amd64 to make sure it works ok. Thanks. http://www.FreeBSD.org/~jhb/spinlock.patch -- John Baldwin <jhb@FreeBSD.org> <>< http://www.FreeBSD.org/~jhb/ "Power Users Use the Power to Serve" = http://www.FreeBSD.org
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