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| author |   Guo Weikang <guoweikang.kernel@gmail.com> | 2025-01-06 10:11:25 +0800 |
|---|---|---|
| committer |   Andrew Morton <akpm@linux-foundation.org> | 2025-01-25 20:22:30 -0800 |
| commit | b2aad24b53333f1904a55d97e3fde2246ef05bb6 (patch) | |
| tree | 36f84ba8c6325f8d16a83bcd97517d2aa2b0f774 /include/linux/memblock.h | |
| parent | mm/fake-numa: allow later numa node hotplug (diff) | |
| download | wireguard-linux-b2aad24b53333f1904a55d97e3fde2246ef05bb6.tar.xz wireguard-linux-b2aad24b53333f1904a55d97e3fde2246ef05bb6.zip | |
mm/memmap: prevent double scanning of memmap by kmemleak
kmemleak explicitly scans the mem_map through the valid struct page
objects. However, memmap_alloc() was also adding this memory to the gray
object list, causing it to be scanned twice. Remove memmap_alloc() from
the scan list and add a comment to clarify the behavior.
Link: https://lore.kernel.org/lkml/CAOm6qn=FVeTpH54wGDFMHuCOeYtvoTx30ktnv9-w3Nh8RMofEA@mail.gmail.com/
Link: https://lkml.kernel.org/r/20250106021126.1678334-1-guoweikang.kernel@gmail.com
Signed-off-by: Guo Weikang <guoweikang.kernel@gmail.com>
Reviewed-by: Catalin Marinas <catalin.marinas@arm.com>
Cc: Mike Rapoport (Microsoft) <rppt@kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Diffstat (limited to 'include/linux/memblock.h')
| -rw-r--r-- | include/linux/memblock.h | 4 |
1 files changed, 4 insertions, 0 deletions
diff --git a/include/linux/memblock.h b/include/linux/memblock.h index 673d5cae7c81..d48b56c1e558 100644 --- a/include/linux/memblock.h +++ b/include/linux/memblock.h @@ -378,6 +378,10 @@ static inline int memblock_get_region_node(const struct memblock_region *r) /* Flags for memblock allocation APIs */ #define MEMBLOCK_ALLOC_ANYWHERE (~(phys_addr_t)0) #define MEMBLOCK_ALLOC_ACCESSIBLE 0 +/* + * MEMBLOCK_ALLOC_NOLEAKTRACE avoids kmemleak tracing. It implies + * MEMBLOCK_ALLOC_ACCESSIBLE + */ #define MEMBLOCK_ALLOC_NOLEAKTRACE 1 /* We are using top down, so it is safe to use 0 here */ |