Date: Sun, 30 Sep 2001 04:44:11 -0500 From: Alfred Perlstein <bright@mu.org> To: Vladimir Dozen <vladimir-dozen@mail.ru> Cc: Matt Dillon <dillon@earth.backplane.com>, Wilko Bulte <wkb@freebie.xs4all.nl>, hackers@FreeBSD.ORG Subject: Re: VM: dynamic swap remapping (patch) Message-ID: <20010930044411.I59854@elvis.mu.org> In-Reply-To: <20010930134437.B284@eix.do-labs.spb.ru>; from vladimir-dozen@mail.ru on Sun, Sep 30, 2001 at 01:44:37PM %2B0000 References: <20010929155941.A291@eix.do-labs.spb.ru> <20010929071024.Q59854@elvis.mu.org> <20010929141349.A80876@freebie.xs4all.nl> <200109291653.f8TGrRR37689@earth.backplane.com> <20010929232953.B341@eix.do-labs.spb.ru> <20010929175653.Z59854@elvis.mu.org> <20010930120328.A534@eix.do-labs.spb.ru> <20010930035529.G59854@elvis.mu.org> <20010930134437.B284@eix.do-labs.spb.ru>
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* Vladimir Dozen <vladimir-dozen@mail.ru> [010930 04:41] wrote: > ehlo. > > > You're still thinking of the combined solution, just think of a > > system where all you have right now is the signals I mentioned. > > Yah, now I think I got it. Well, actually, signal(s) is all > I need. The remapping was just a bonus. To be more precise, > I need the only signal -- at low mark passed. Some other > application might be interested in second -- hi mark -- > signal, but my doesn't. > > SIGDANGER is the signal from Irix, AFAIR? > > So, how about to accept this name (just to not increase entropy > of the Universe) and send it to all processes when nswap_lowat > reached? > > The only point -- I prefer to have ability to set nswap_lowat > via sysctl since I cannot predict what amount of memory can > be consumed while freeing memory ;) (e.g., throwing exception > in C++ may eat memory due to creating exception object; logging > may eat memory also). You want to submit a patch? If not I can take a look at it, but it's been a bit since I've looked at the vm system. > > > Just think what happens if your filesystems are full and you run > > out of swap... > > The same that happens today -- killproc() will kill me. > The situation doesn't becomes worse with remapping, it just > ... mmm... prolonges. > > -- > dozen @ home -- -Alfred Perlstein [alfred@freebsd.org] 'Instead of asking why a piece of software is using "1970s technology," start asking why software is ignoring 30 years of accumulated wisdom.' To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-hackers" in the body of the message
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