Date: Thu, 04 Dec 2008 11:44:43 +0100 From: Ivan Voras <ivoras@freebsd.org> To: freebsd-hardware@freebsd.org Subject: Re: swap zone exhausted, increase kern.maxswzone Message-ID: <gh8cap$425$1@ger.gmane.org> In-Reply-To: <200812041131.37944.nick@van-laarhoven.org> References: <49377719.2020605@ccstores.com> <200812041131.37944.nick@van-laarhoven.org>
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Nick Hibma wrote:
> 100%|nick@hind:/sys-CURRENT % grep -r maxswzone .
> ./conf/NOTES:# 2. In /boot/loader.conf, set the tunables kern.maxswzone,
> ./kern/.svn/text-base/subr_param.c.svn-base:int
> maxswzone; /* max swmeta KVA storage */
> ./kern/.svn/text-base/subr_param.c.svn-base:SYSCTL_INT(_kern, OID_AUTO,
> maxswzone, CTLFLAG_RDTUN, &maxswzone, 0,
> ./kern/.svn/text-base/subr_param.c.svn-base: maxswzone =
> VM_SWZONE_SIZE_MAX;
> ./kern/.svn/text-base/subr_param.c.svn-base:
> TUNABLE_INT_FETCH("kern.maxswzone", &maxswzone);
> ./kern/subr_param.c:int maxswzone; /* max swmeta KVA
> storage */
> ./kern/subr_param.c:SYSCTL_INT(_kern, OID_AUTO, maxswzone, CTLFLAG_RDTUN,
> &maxswzone, 0,
> ./kern/subr_param.c: maxswzone = VM_SWZONE_SIZE_MAX;
> ./kern/subr_param.c: TUNABLE_INT_FETCH("kern.maxswzone", &maxswzone);
> ./boot/forth/.svn/text-base/loader.conf.svn-base:#kern.maxswzone=""
> # Set the max swmeta KVA storage
> ./boot/forth/loader.conf:#kern.maxswzone="" # Set the max swmeta
> KVA storage
> ./boot/common/.svn/text-base/loader.8.svn-base:.It Va kern.maxswzone
> ./boot/common/loader.8:.It Va kern.maxswzone
>
>
> So:
>
> It is a kenv var not a sysctl. It's default is VM_SWZONE_SIZE_MAX
Which is:
/sys> grep -rn VM_SWZONE_SIZE_MAX *
amd64/include/param.h:129:#ifndef VM_SWZONE_SIZE_MAX
amd64/include/param.h:130:#define VM_SWZONE_SIZE_MAX (32 * 1024 * 1024)
If I'm reading this correctly in the context of the OP, it costs more
than 32 MB to keep track of 20 GB of swap space :)
(I'm not suprised, just noticing)
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