The branch main has been updated by bnovkov:
URL:
https://cgit.FreeBSD.org/src/commit/?id=78f3e0f6b3ad70d9574730fc3338474376ef8ebd
commit 78f3e0f6b3ad70d9574730fc3338474376ef8ebd
Author: Bojan Novković <bnov...@freebsd.org>
AuthorDate: 2024-05-03 18:18:56 +0000
Commit: Bojan Novković <bnov...@freebsd.org>
CommitDate: 2024-07-30 15:38:18 +0000
malloc(9): Introduce M_NEVERFREED
This patch adds an additional malloc(9) flag to distinguish allocations
that are never freed during runtime.
Differential Revision: https://reviews.freebsd.org/D45045
Reviewed by: alc, kib, markj
Tested by: alc
---
sys/sys/malloc.h | 3 ++-
sys/vm/uma_core.c | 3 +++
2 files changed, 5 insertions(+), 1 deletion(-)
diff --git a/sys/sys/malloc.h b/sys/sys/malloc.h
index dfd7928fc258..9b281da4b4d4 100644
--- a/sys/sys/malloc.h
+++ b/sys/sys/malloc.h
@@ -60,8 +60,9 @@
#define M_BESTFIT 0x2000 /* only for vmem, low
fragmentation */
#define M_EXEC 0x4000 /* allocate executable space */
#define M_NEXTFIT 0x8000 /* only for vmem, follow cursor
*/
+#define M_NEVERFREED 0x10000 /* chunk will never get freed */
-#define M_VERSION 2020110501
+#define M_VERSION 2024073001
/*
* Two malloc type structures are present: malloc_type, which is used by a
diff --git a/sys/vm/uma_core.c b/sys/vm/uma_core.c
index 516ac2c2965a..e93c561d759a 100644
--- a/sys/vm/uma_core.c
+++ b/sys/vm/uma_core.c
@@ -1791,6 +1791,9 @@ keg_alloc_slab(uma_keg_t keg, uma_zone_t zone, int
domain, int flags,
if (keg->uk_flags & UMA_ZONE_NODUMP)
aflags |= M_NODUMP;
+ if (keg->uk_flags & UMA_ZONE_NOFREE)
+ aflags |= M_NEVERFREED;
+
/* zone is passed for legacy reasons. */
size = keg->uk_ppera * PAGE_SIZE;
mem = keg->uk_allocf(zone, size, domain, &sflags, aflags);
