[PATCHv7 02/19] mm/zsmalloc: Prepare to variable MAX_PHYSMEM_BITS
From: Kirill A. Shutemov <hidden>
Date: 2017-09-18 11:00:50
Also in:
lkml
Subsystem:
memory management, the rest, zsmalloc compressed slab memory allocator · Maintainers:
Andrew Morton, Linus Torvalds, Minchan Kim, Sergey Senozhatsky
With boot-time switching between paging mode we will have variable MAX_PHYSMEM_BITS. Let's use the maximum variable possible for CONFIG_X86_5LEVEL=y configuration to define zsmalloc data structures. Signed-off-by: Kirill A. Shutemov <redacted> Cc: Minchan Kim <minchan@kernel.org> Cc: Nitin Gupta <redacted> Cc: Sergey Senozhatsky <redacted> --- mm/zsmalloc.c | 6 ++++++ 1 file changed, 6 insertions(+)
diff --git a/mm/zsmalloc.c b/mm/zsmalloc.c
index 7c38e850a8fc..fe22661f2fe5 100644
--- a/mm/zsmalloc.c
+++ b/mm/zsmalloc.c@@ -93,7 +93,13 @@ #define MAX_PHYSMEM_BITS BITS_PER_LONG #endif #endif + +#ifdef CONFIG_X86_5LEVEL +/* MAX_PHYSMEM_BITS is variable, use maximum value here */ +#define _PFN_BITS (52 - PAGE_SHIFT) +#else #define _PFN_BITS (MAX_PHYSMEM_BITS - PAGE_SHIFT) +#endif /* * Memory for allocating for handle keeps object position by
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2.14.1
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