|
 |
e64a0b |
From 14f8c460473c8613553b5defd174ca2af812ddcb Mon Sep 17 00:00:00 2001
|
|
|
e64a0b |
From: Alexander Egorenkov <egorenar@linux.ibm.com>
|
|
|
e64a0b |
Date: Mon, 6 Dec 2021 16:04:19 +0100
|
|
|
e64a0b |
Subject: [PATCH 04/10] memory: Handle struct slab changes on Linux 5.17-rc1
|
|
|
e64a0b |
and later
|
|
|
e64a0b |
|
|
|
e64a0b |
Since kernel commit d122019bf061 ("mm: Split slab into its own type"),
|
|
|
e64a0b |
the struct slab is used for both SLAB and SLUB. Therefore, don't depend
|
|
|
e64a0b |
on the non-presence of the struct slab to decide whether SLAB implementation
|
|
|
e64a0b |
should be chosen and use the member variable "cpu_slab" of the struct
|
|
|
e64a0b |
kmem_cache instead, it should be present only in SLUB.
|
|
|
e64a0b |
|
|
|
e64a0b |
Without the patch, crash fails to start with the error message:
|
|
|
e64a0b |
|
|
|
e64a0b |
crash: invalid structure member offset: kmem_cache_s_num
|
|
|
e64a0b |
FILE: memory.c LINE: 9619 FUNCTION: kmem_cache_init()
|
|
|
e64a0b |
|
|
|
e64a0b |
Signed-off-by: Alexander Egorenkov <egorenar@linux.ibm.com>
|
|
|
e64a0b |
---
|
|
|
e64a0b |
memory.c | 3 ++-
|
|
|
e64a0b |
1 file changed, 2 insertions(+), 1 deletion(-)
|
|
|
e64a0b |
|
|
|
e64a0b |
diff --git a/memory.c b/memory.c
|
|
|
e64a0b |
index 86c02c132890..5af45fd7d834 100644
|
|
|
e64a0b |
--- a/memory.c
|
|
|
e64a0b |
+++ b/memory.c
|
|
|
e64a0b |
@@ -576,7 +576,8 @@ vm_init(void)
|
|
|
e64a0b |
STRUCT_SIZE_INIT(cpucache_s, "cpucache_s");
|
|
|
e64a0b |
|
|
|
e64a0b |
} else if (!VALID_STRUCT(kmem_slab_s) &&
|
|
|
e64a0b |
- !VALID_STRUCT(slab_s) &&
|
|
|
e64a0b |
+ !VALID_STRUCT(slab_s) &&
|
|
|
e64a0b |
+ !MEMBER_EXISTS("kmem_cache", "cpu_slab") &&
|
|
|
e64a0b |
(VALID_STRUCT(slab) || (vt->flags & SLAB_OVERLOAD_PAGE))) {
|
|
|
e64a0b |
vt->flags |= PERCPU_KMALLOC_V2;
|
|
|
e64a0b |
|
|
|
e64a0b |
--
|
|
|
e64a0b |
2.20.1
|
|
|
e64a0b |
|