Date: Mon, 18 Jan 1999 15:40:18 -0500 (EST) From: Brian Feldman <green@unixhelp.org> To: Mike Smith <mike@smith.net.au> Cc: Julian Elischer <julian@whistle.com>, current@FreeBSD.ORG Subject: Re: kernel malloc and M_CANWAIT Message-ID: <Pine.BSF.4.05.9901181535440.18713-100000@janus.syracuse.net> In-Reply-To: <199901182029.MAA18468@dingo.cdrom.com>
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On Mon, 18 Jan 1999, Mike Smith wrote: > > On Mon, 18 Jan 1999, Mike Smith wrote: > > > > > > > > > > Here at whistle we are trying to remember about a conversation > > > > regarding malloc that occured recently. Maybe others can help. > > > > > > > > There was some talk about the fact that malloc(..M_CANWAIT) > > > > can now return with a failure. Is that true? > > > > > > Yes; it's necessary to do this to allow some chance of avoiding > > > deadlock. > > > > Ouch! Is everything in src-sys already checking the return value of an M_WAITOK? > > Probably not, no. I had some patches from Andrzej who was trying to do > it just for the mbuf allocator case; there's definitely a call for > someone to take the time to clean things up. Well, it'll be hard to determine (for me, not knowing any of the kernel well) whether it's proper for: a. return EAGAIN b. return ENOMEN c. try again, then return EAGAIN/ENOMEM? But I'm going to start fixing what I can. It would have been nice for a HEADS UP! or somesuch. > > -- > \\ Sometimes you're ahead, \\ Mike Smith > \\ sometimes you're behind. \\ mike@smith.net.au > \\ The race is long, and in the \\ msmith@freebsd.org > \\ end it's only with yourself. \\ msmith@cdrom.com > > > > To Unsubscribe: send mail to majordomo@FreeBSD.org > with "unsubscribe freebsd-current" in the body of the message > Brian Feldman _ __ ___ ___ ___ green@unixhelp.org _ __ ___ | _ ) __| \ http://www.freebsd.org/ _ __ ___ ____ | _ \__ \ |) | FreeBSD: The Power to Serve! _ __ ___ ____ _____ |___/___/___/ To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-current" in the body of the message
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