From owner-cvs-all Wed Jun 30 10:44:20 1999 Delivered-To: cvs-all@freebsd.org Received: from alpo.whistle.com (alpo.whistle.com [207.76.204.38]) by hub.freebsd.org (Postfix) with ESMTP id 7B16D15583; Wed, 30 Jun 1999 10:44:12 -0700 (PDT) (envelope-from julian@whistle.com) Received: from current1.whistle.com (current1.whistle.com [207.76.205.22]) by alpo.whistle.com (8.9.1a/8.9.1) with SMTP id KAA32425; Wed, 30 Jun 1999 10:44:05 -0700 (PDT) Date: Wed, 30 Jun 1999 10:44:04 -0700 (PDT) From: Julian Elischer To: Garrett Wollman Cc: Peter Wemm , cvs-committers@FreeBSD.org, cvs-all@FreeBSD.org Subject: Re: cvs commit: src/sys/kern init_main.c kern_fork.c kern_linker.c vfs_aio.c src/sys/sys proc.h In-Reply-To: <199906301545.LAA24873@khavrinen.lcs.mit.edu> Message-ID: MIME-Version: 1.0 Content-Type: TEXT/PLAIN; charset=US-ASCII Sender: owner-cvs-all@FreeBSD.ORG Precedence: bulk On Wed, 30 Jun 1999, Garrett Wollman wrote: > < said: > > > syscalls set p->p_retval[] themselves. Simplify the SYSINIT_KT() code > > and other kernel thread creators to not need to use pfind() to find the > > child based on the pid. While here, partly tidy up some of the fork1() > > On an almost-unrelated tangent... > > Because proc structures are now stored in type-stable memory (via the > zone allocator), other places in the kernel which now reference > processes by pid and pfind should be able to keep a reference to the > proc instead. (There does need to be a version number which gets > incremented when proc structs are recycled, but this should still be > cheaper than pfind().) This would benefit network applications > written around a poll or select loop, since the simple case of > selwakeup() uses pfind() to locate the specific process to wake up. Bill Jolitz added the PID stuff because there can be races where the proc structure is re-used.. I can't remember the exact case but my gut feeling is that whatever it was is still there.. julian > > -GAWollman > > -- > Garrett A. Wollman | O Siem / We are all family / O Siem / We're all the same > wollman@lcs.mit.edu | O Siem / The fires of freedom > Opinions not those of| Dance in the burning flame > MIT, LCS, CRS, or NSA| - Susan Aglukark and Chad Irschick > > To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe cvs-all" in the body of the message