From owner-freebsd-hackers  Sun Sep 30  3:57:40 2001
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Date: Sun, 30 Sep 2001 15:00:31 +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: <20010930150031.C284@eix.do-labs.spb.ru>
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> <20010930044411.I59854@elvis.mu.org>
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ehlo.

> 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.

  except for sysctl, the patch is quite simple due to the fact
  that histeresis is already implemented in swap_pager.c, something
  like:

============================================
diff vm/swap_pager.c vm.new/swap_pager.c
217a218,219
>         struct proc* p;
>   
218a221,225
>                 /* warn all processes */
>                 for( p = allproc.lh_first; p != 0; p = p->p_list.le_next ) 
>                 {
>                   psignal(p,SIGDANGER);
>                 }
============================================

============================================
diff sys/signal.h sys.new/signal.h
105a106,109
> #ifndef _POSIX_SOURCE
> #define SIGDANGER       32      /* close to out-of-memory */
> #endif
> 
============================================

============================================
diff kern/kern_sig.c kern.new/kern_sig.c
165a166
>         SA_IGNORE               /* SIGDANGER */
============================================

-- 
dozen @ home

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