Author: des Date: Mon Aug 27 13:22:27 2012 New Revision: 239730 URL: http://svn.freebsd.org/changeset/base/239730
Log: Parly revert r239255: reinstate a default maxswzone on i386, where KVA is scarce, but set it slightly higher so we can handle 8 GB of swap. Modified: head/sys/i386/include/param.h Modified: head/sys/i386/include/param.h ============================================================================== --- head/sys/i386/include/param.h Mon Aug 27 13:05:15 2012 (r239729) +++ head/sys/i386/include/param.h Mon Aug 27 13:22:27 2012 (r239730) @@ -123,6 +123,20 @@ #define KSTACK_GUARD_PAGES 1 /* pages of kstack guard; 0 disables */ /* + * Ceiling on amount of swblock kva space, can be changed via + * the kern.maxswzone /boot/loader.conf variable. + * + * 276 is sizeof(struct swblock), but we do not always have a definition + * in scope for struct swblock, so we have to hardcode it. Each struct + * swblock holds metadata for 32 pages, so in theory, this is enough for + * 16 GB of swap. In practice, however, the usable amount is considerably + * lower due to fragmentation. + */ +#ifndef VM_SWZONE_SIZE_MAX +#define VM_SWZONE_SIZE_MAX (276 * 128 * 1024) +#endif + +/* * Ceiling on size of buffer cache (really only effects write queueing, * the VM page cache is not effected), can be changed via * the kern.maxbcache /boot/loader.conf variable. _______________________________________________ svn-src-head@freebsd.org mailing list http://lists.freebsd.org/mailman/listinfo/svn-src-head To unsubscribe, send any mail to "svn-src-head-unsubscr...@freebsd.org"
