Date: Fri, 1 Jul 2005 10:05:20 -0400 From: John Baldwin <jhb@FreeBSD.org> To: Peter Edwards <peadar@FreeBSD.org> Cc: arch@FreeBSD.org Subject: Re: ktrace and KTR_DROP Message-ID: <200507011005.21343.jhb@FreeBSD.org> In-Reply-To: <20050701132104.GA95135@freefall.freebsd.org> References: <20050701132104.GA95135@freefall.freebsd.org>
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On Friday 01 July 2005 09:21 am, Peter Edwards wrote: > Y'all, > > Ever since the introduction of a separate ktrace worker thread for > writing output, there's the distinct possibility that ktrace output > will drop requests. For some proceses, it's actually inevitable: > as long as the traced processes can sustain a rate of generating > ktrace events faster than the ktrace thread can write them, you'll > eventually run out of ktrace requests. The patch looks good to me, and I'd even be ok with having neverdrop on by default. -- 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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