The branch main has been updated by markj:
URL:
https://cgit.FreeBSD.org/src/commit/?id=d6e77cda9be1509ea170142cca3ff0d3b9f12e35
commit d6e77cda9be1509ea170142cca3ff0d3b9f12e35
Author: Mark Johnston <ma...@freebsd.org>
AuthorDate: 2021-09-17 16:13:47 +0000
Commit: Mark Johnston <ma...@freebsd.org>
CommitDate: 2021-09-17 18:19:05 +0000
uma: Show the count of free slabs in each per-domain keg's sysctl tree
This is useful for measuring the number of pages that could be freed
from a NOFREE zone under memory pressure.
MFC after: 1 week
Sponsored by: The FreeBSD Foundation
---
sys/vm/uma_core.c | 5 ++++-
1 file changed, 4 insertions(+), 1 deletion(-)
diff --git a/sys/vm/uma_core.c b/sys/vm/uma_core.c
index cdf3d482679e..12cab490781b 100644
--- a/sys/vm/uma_core.c
+++ b/sys/vm/uma_core.c
@@ -2690,7 +2690,10 @@ zone_alloc_sysctl(uma_zone_t zone, void *unused)
"Total pages currently allocated from VM");
SYSCTL_ADD_U32(NULL, SYSCTL_CHILDREN(oid), OID_AUTO,
"free_items", CTLFLAG_RD, &dom->ud_free_items, 0,
- "items free in the slab layer");
+ "Items free in the slab layer");
+ SYSCTL_ADD_U32(NULL, SYSCTL_CHILDREN(oid), OID_AUTO,
+ "free_slabs", CTLFLAG_RD, &dom->ud_free_slabs, 0,
+ "Unused slabs");
}
} else
SYSCTL_ADD_CONST_STRING(NULL, SYSCTL_CHILDREN(oid), OID_AUTO,
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