Date: Sat, 20 Oct 2012 19:34:56 +0000 From: "Poul-Henning Kamp" <phk@phk.freebsd.dk> To: Alan Cox <alc@rice.edu> Cc: Tim LaBerge <tlaberge@juniper.net>, "freebsd-arch@freebsd.org Arch" <freebsd-arch@FreeBSD.org>, Jason Evans <jasone@FreeBSD.org>, Marcel Moolenaar <marcel@xcllnt.net> Subject: Re: Behavior of madvise(MADV_FREE) Message-ID: <92742.1350761696@critter.freebsd.dk> In-Reply-To: <5082F0F3.1070102@rice.edu> References: <9FEBC10C-C453-41BE-8829-34E830585E90@xcllnt.net> <4835.1350062021@critter.freebsd.dk> <E6A52D27-0D6A-4175-9ECA-ADE25BFF35C2@xcllnt.net> <F71ACE9D-297E-4565-BB8D-D95D46D90708@freebsd.org> <F67D539D-8BE3-4817-8466-C76DE43AE252@xcllnt.net> <5082F0F3.1070102@rice.edu>
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-------- In message <5082F0F3.1070102@rice.edu>, Alan Cox writes: >I'm sympathetic. Once upon a time, I was often called upon to explain >to network administrators why their idle web cache didn't have oodles of >"free" memory and how this wasn't a problem. You too ? :-) >I think that you're being a bit too pessimistic here. If your use case >really corresponds to "this memory is free and will not be reused (or >reallocated for a very long time)" Which brings me to a question I have wondered: Why not simply munmap(2) it until you need it again ? -- Poul-Henning Kamp | UNIX since Zilog Zeus 3.20 phk@FreeBSD.ORG | TCP/IP since RFC 956 FreeBSD committer | BSD since 4.3-tahoe Never attribute to malice what can adequately be explained by incompetence.
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