Author: jeff Date: Tue Aug 6 23:04:59 2019 New Revision: 350661 URL: https://svnweb.freebsd.org/changeset/base/350661
Log: Implement a MINBUCKET zone flag so we can use minimal caching on zones that may be expensive to cache. Reviewed by: markj, kib Sponsored by: Netflix Differential Revision: https://reviews.freebsd.org/D20930 Modified: head/sys/vm/uma.h head/sys/vm/uma_core.c Modified: head/sys/vm/uma.h ============================================================================== --- head/sys/vm/uma.h Tue Aug 6 22:36:29 2019 (r350660) +++ head/sys/vm/uma.h Tue Aug 6 23:04:59 2019 (r350661) @@ -274,6 +274,7 @@ uma_zone_t uma_zcache_create(char *name, int size, uma * NUMA aware Zone. Implements a best * effort first-touch policy. */ +#define UMA_ZONE_MINBUCKET 0x20000 /* Use smallest buckets. */ /* * These flags are shared between the keg and zone. In zones wishing to add Modified: head/sys/vm/uma_core.c ============================================================================== --- head/sys/vm/uma_core.c Tue Aug 6 22:36:29 2019 (r350660) +++ head/sys/vm/uma_core.c Tue Aug 6 23:04:59 2019 (r350661) @@ -209,6 +209,7 @@ struct uma_bucket_zone { (((sizeof(void *) * (n)) - sizeof(struct uma_bucket)) / sizeof(void *)) #define BUCKET_MAX BUCKET_SIZE(256) +#define BUCKET_MIN BUCKET_SIZE(4) struct uma_bucket_zone bucket_zones[] = { { NULL, "4 Bucket", BUCKET_SIZE(4), 4096 }, @@ -1867,9 +1868,12 @@ out: KASSERT((arg->flags & (UMA_ZONE_MAXBUCKET | UMA_ZONE_NOBUCKET)) != (UMA_ZONE_MAXBUCKET | UMA_ZONE_NOBUCKET), ("Invalid zone flag combination")); - if ((arg->flags & UMA_ZONE_MAXBUCKET) != 0) + if ((arg->flags & UMA_ZONE_MAXBUCKET) != 0) { zone->uz_count = BUCKET_MAX; - else if ((arg->flags & UMA_ZONE_NOBUCKET) != 0) + } else if ((arg->flags & UMA_ZONE_MINBUCKET) != 0) { + zone->uz_count = BUCKET_MIN; + zone->uz_count_max = BUCKET_MIN; + } else if ((arg->flags & UMA_ZONE_NOBUCKET) != 0) zone->uz_count = 0; else zone->uz_count = bucket_select(zone->uz_size); _______________________________________________ svn-src-head@freebsd.org mailing list https://lists.freebsd.org/mailman/listinfo/svn-src-head To unsubscribe, send any mail to "svn-src-head-unsubscr...@freebsd.org"
