Date: Sun, 30 Sep 2001 13:44:37 +0000 From: Vladimir Dozen <vladimir-dozen@mail.ru> To: Alfred Perlstein <bright@mu.org> Cc: Vladimir Dozen <vladimir-dozen@mail.ru>, Matt Dillon <dillon@earth.backplane.com>, Wilko Bulte <wkb@freebie.xs4all.nl>, hackers@FreeBSD.ORG Subject: Re: VM: dynamic swap remapping (patch) Message-ID: <20010930134437.B284@eix.do-labs.spb.ru> In-Reply-To: <20010930035529.G59854@elvis.mu.org>; from bright@mu.org on Sun, Sep 30, 2001 at 03:55:29AM -0500 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>
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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). > 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 To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-hackers" in the body of the message
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