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authorCatalin Marinas <catalin.marinas@arm.com>2019-09-23 15:34:05 -0700
committerLinus Torvalds <torvalds@linux-foundation.org>2019-09-24 15:54:07 -0700
commitc5665868183fec689dbab9fb8505188b2c4f0757 (patch)
tree55c3277578a7444491e77fb3887e9783d3679e82 /init/main.c
parentmm: kmemleak: simple memory allocation pool for kmemleak objects (diff)
downloadlinux-dev-c5665868183fec689dbab9fb8505188b2c4f0757.tar.xz
linux-dev-c5665868183fec689dbab9fb8505188b2c4f0757.zip
mm: kmemleak: use the memory pool for early allocations
Currently kmemleak uses a static early_log buffer to trace all memory allocation/freeing before the slab allocator is initialised. Such early log is replayed during kmemleak_init() to properly initialise the kmemleak metadata for objects allocated up that point. With a memory pool that does not rely on the slab allocator, it is possible to skip this early log entirely. In order to remove the early logging, consider kmemleak_enabled == 1 by default while the kmem_cache availability is checked directly on the object_cache and scan_area_cache variables. The RCU callback is only invoked after object_cache has been initialised as we wouldn't have any concurrent list traversal before this. In order to reduce the number of callbacks before kmemleak is fully initialised, move the kmemleak_init() call to mm_init(). [akpm@linux-foundation.org: coding-style fixes] [akpm@linux-foundation.org: remove WARN_ON(), per Catalin] Link: http://lkml.kernel.org/r/20190812160642.52134-4-catalin.marinas@arm.com Signed-off-by: Catalin Marinas <catalin.marinas@arm.com> Cc: Matthew Wilcox <willy@infradead.org> Cc: Michal Hocko <mhocko@kernel.org> Cc: Qian Cai <cai@lca.pw> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'init/main.c')
-rw-r--r--init/main.c2
1 files changed, 1 insertions, 1 deletions
diff --git a/init/main.c b/init/main.c
index 653693da8da6..3ca67e8b92fd 100644
--- a/init/main.c
+++ b/init/main.c
@@ -556,6 +556,7 @@ static void __init mm_init(void)
report_meminit();
mem_init();
kmem_cache_init();
+ kmemleak_init();
pgtable_init();
debug_objects_mem_init();
vmalloc_init();
@@ -740,7 +741,6 @@ asmlinkage __visible void __init start_kernel(void)
initrd_start = 0;
}
#endif
- kmemleak_init();
setup_per_cpu_pageset();
numa_policy_init();
acpi_early_init();