Date: Thu, 18 Jul 2002 11:55:38 -0700 From: Alfred Perlstein <bright@mu.org> To: Matthew Dillon <dillon@apollo.backplane.com> Cc: John Baldwin <jhb@FreeBSD.ORG>, current@FreeBSD.ORG Subject: Re: Questions about kern_descrip.c Message-ID: <20020718185538.GJ77219@elvis.mu.org> In-Reply-To: <200207181840.g6IIe25G019269@apollo.backplane.com> References: <XFMail.20020718134618.jhb@FreeBSD.org> <200207181840.g6IIe25G019269@apollo.backplane.com>
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* Matthew Dillon <dillon@apollo.backplane.com> [020718 11:40] wrote: > > fdalloc() does not reserve the descriptor number it > returns, it simply finds a free slot and says 'this > index is a free slot'. Even in the latest -current, > fdalloc() releases the fdp lock when it goes to > MALLOC so the race appears to still be present. This is true. I think one way to fix this is to preallocate the 'struct file' you're going to put into the array and have fdalloc() insert the created file instead of just finding a slot. Problem is that it's a bunch of grunt work to do this. -- -Alfred Perlstein [alfred@freebsd.org] 'Instead of asking why a piece of software is using "1970s technology," start asking why software is ignoring 30 years of accumulated wisdom.' Tax deductible donations for FreeBSD: http://www.freebsdfoundation.org/ To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-current" in the body of the message
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