c/mirror_zfs
1
0
Fork 0
mirror of https://git.proxmox.com/git/mirror_zfs.git synced 2026-05-22 02:27:36 +03:00
Code Issues Packages Projects Releases Wiki Activity

Linux: Report reclaimable memory to kernel as such (#16385)

Browse Source 
Linux provides SLAB_RECLAIM_ACCOUNT and __GFP_RECLAIMABLE flags to
mark memory allocations that can be freed via shinker calls.  It
should allow kernel to tune and group such allocations for lower
memory fragmentation and better reclamation under pressure.

This patch marks as reclaimable most of ARC memory, directly
evictable via ZFS shrinker, plus also dnode/znode/sa memory,
indirectly evictable via kernel's superblock shrinker.

Signed-off-by:	Alexander Motin <mav@FreeBSD.org>
Sponsored by:	iXsystems, Inc.
Reviewed-by: Tony Hutter <hutter2@llnl.gov>
Reviewed-by: Allan Jude <allan@klarasystems.com>
This commit is contained in:
Alexander Motin
2024-07-30 14:40:47 -04:00
committed by GitHub
parent d54d0fff39
commit d4b5517ef9
14 changed files with 29 additions and 14 deletions
Download Patch File Download Diff File Expand all files Collapse all files
include/os/linux/spl/sys/kmem_cache.h
+2 -3
View File
@@ -45,6 +45,7 @@ typedef enum kmc_bit {
KMC_BIT_TOTAL = 18, /* Proc handler helper bit */
KMC_BIT_ALLOC = 19, /* Proc handler helper bit */
KMC_BIT_MAX = 20, /* Proc handler helper bit */
KMC_BIT_RECLAIMABLE = 21, /* Can be freed by shrinker */
} kmc_bit_t;
/* kmem move callback return values */
@@ -66,9 +67,7 @@ typedef enum kmem_cbrc {
#define KMC_TOTAL (1 << KMC_BIT_TOTAL)
#define KMC_ALLOC (1 << KMC_BIT_ALLOC)
#define KMC_MAX (1 << KMC_BIT_MAX)
#define KMC_REAP_CHUNK INT_MAX
#define KMC_DEFAULT_SEEKS 1
#define KMC_RECLAIMABLE (1 << KMC_BIT_RECLAIMABLE)
extern struct list_head spl_kmem_cache_list;
extern struct rw_semaphore spl_kmem_cache_sem;