Date: Fri, 7 Jun 2002 10:23:57 -0700 From: Alfred Perlstein <bright@mu.org> To: John Baldwin <jhb@FreeBSD.org> Cc: arch@FreeBSD.org Subject: Re: KTRACE genio trace question Message-ID: <20020607172357.GS88163@elvis.mu.org> In-Reply-To: <XFMail.20020607123531.jhb@FreeBSD.org> References: <XFMail.20020607123531.jhb@FreeBSD.org>
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* John Baldwin <jhb@FreeBSD.org> [020607 09:35] wrote: > > What I would like to do is change the behavior of I/O trace events to > go back to doing the copyin() before the VOP_WRITE(), but to set a max > limit on the amount of data we will output in the trace. This limit > would probably default to a single page and could be a loader tunable > and sysctl. This would allow us to get rid of the need for synchronous > ktrace events cleaning up the ktrace code a bit. It would also go back > to using a single VOP_WRITE for all of the the I/O. Thoughts? That sounds reasonable. -Alfred To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-arch" in the body of the message
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