Date: Mon, 24 Jun 2002 00:21:06 -0600 From: "Kenneth D. Merry" <ken@kdm.org> To: Mike Silbersack <silby@silby.com> Cc: net@freebsd.org, current@freebsd.org Subject: Re: zero copy code checkin in 2 days, new snapshot Message-ID: <20020624002106.A44519@panzer.kdm.org> In-Reply-To: <20020624011221.L50974-100000@patrocles.silby.com>; from silby@silby.com on Mon, Jun 24, 2002 at 01:17:03AM -0500 References: <20020623233627.A44237@panzer.kdm.org> <20020624011221.L50974-100000@patrocles.silby.com>
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On Mon, Jun 24, 2002 at 01:17:03 -0500, Mike Silbersack wrote: > On Sun, 23 Jun 2002, Kenneth D. Merry wrote: > > > I'm planning on checking in the zero copy sockets code Tuesday evening, > > MDT. If there are any concerns, I'm more than willing to delay it. > > Out of curiousity, what happens when the page being write()n is a mmap'd > page shared by multiple processes? Will the page be shared? That could > be a big reduction in mbuf cluster usage on some http/ftp systems, I'd > guess. The page would be shared, until one of the processes decides to write to it while it is still referenced in the kernel. If that happens, it'll get copied. Ken -- Kenneth Merry ken@kdm.org To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-current" in the body of the message
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