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Remove KMC_KMEM and KMC_VMEM

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`KMC_KMEM` and `KMC_VMEM` are now unused since all SPL-implemented
caches are `KMC_KVMEM`.

KMC_KMEM: Given the default value of `spl_kmem_cache_kmem_limit`, we
don't use kmalloc to back the SPL caches, instead we use kvmalloc
(KMC_KVMEM).  The flag, module parameter, /proc entries, and associated
code are removed.

KMC_VMEM: This flag is not used, and kvmalloc() is always preferable to
vmalloc().  The flag, /proc entries, and associated code are removed.

Reviewed-by: Brian Behlendorf <behlendorf1@llnl.gov>
Reviewed-by: Ryan Moeller <ryan@iXsystems.com>
Signed-off-by: Matthew Ahrens <mahrens@delphix.com>
Closes #10673
This commit is contained in:
Matthew Ahrens
2020-08-17 16:04:28 -07:00
committed by GitHub
parent 3df0c2fa32
commit 994de7e4b7
5 changed files with 10 additions and 151 deletions
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include/os/linux/spl/sys/kmem_cache.h
-4
View File
@@ -37,8 +37,6 @@
*/
typedef enum kmc_bit {
KMC_BIT_NODEBUG = 1, /* Default behavior */
KMC_BIT_KMEM = 5, /* Use kmem cache */
KMC_BIT_VMEM = 6, /* Use vmem cache */
KMC_BIT_KVMEM = 7, /* Use kvmalloc linux allocator */
KMC_BIT_SLAB = 8, /* Use Linux slab cache */
KMC_BIT_DEADLOCKED = 14, /* Deadlock detected */
@@ -60,8 +58,6 @@ typedef enum kmem_cbrc {
} kmem_cbrc_t;
#define KMC_NODEBUG (1 << KMC_BIT_NODEBUG)
#define KMC_KMEM (1 << KMC_BIT_KMEM)
#define KMC_VMEM (1 << KMC_BIT_VMEM)
#define KMC_KVMEM (1 << KMC_BIT_KVMEM)
#define KMC_SLAB (1 << KMC_BIT_SLAB)
#define KMC_DEADLOCKED (1 << KMC_BIT_DEADLOCKED)