From: "Kirill A. Shutemov" <kirill.shutemov@linux.intel.com>
To: Ingo Molnar <mingo@redhat.com>,
Linus Torvalds <torvalds@linux-foundation.org>,
x86@kernel.org, Thomas Gleixner <tglx@linutronix.de>,
"H. Peter Anvin" <hpa@zytor.com>
Cc: Andrew Morton <akpm@linux-foundation.org>,
Andy Lutomirski <luto@amacapital.net>,
Borislav Petkov <bp@suse.de>,
linux-mm@kvack.org, linux-kernel@vger.kernel.org,
"Kirill A. Shutemov" <kirill.shutemov@linux.intel.com>,
Minchan Kim <minchan@kernel.org>, Nitin Gupta <ngupta@vflare.org>,
Sergey Senozhatsky <sergey.senozhatsky.work@gmail.com>
Subject: [PATCHv6 02/19] mm/zsmalloc: Prepare to variable MAX_PHYSMEM_BITS
Date: Wed, 23 Aug 2017 15:03:15 +0300 [thread overview]
Message-ID: <20170823120332.2288-3-kirill.shutemov@linux.intel.com> (raw)
In-Reply-To: <20170823120332.2288-1-kirill.shutemov@linux.intel.com>
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 <kirill.shutemov@linux.intel.com>
Cc: Minchan Kim <minchan@kernel.org>
Cc: Nitin Gupta <ngupta@vflare.org>
Cc: Sergey Senozhatsky <sergey.senozhatsky.work@gmail.com>
---
mm/zsmalloc.c | 6 ++++++
1 file changed, 6 insertions(+)
diff --git a/mm/zsmalloc.c b/mm/zsmalloc.c
index 308acb9d814b..d44129613768 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
--
2.14.1
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next prev parent reply other threads:[~2017-08-23 12:04 UTC|newest]
Thread overview: 20+ messages / expand[flat|nested] mbox.gz Atom feed top
2017-08-23 12:03 [PATCHv6 00/19] Boot-time switching between 4- and 5-level paging Kirill A. Shutemov
2017-08-23 12:03 ` [PATCHv6 01/19] mm/sparsemem: Allocate mem_section at runtime for SPARSEMEM_EXTREME Kirill A. Shutemov
2017-08-23 12:03 ` Kirill A. Shutemov [this message]
2017-08-23 12:03 ` [PATCHv6 03/19] x86/kasan: Use the same shadow offset for 4- and 5-level paging Kirill A. Shutemov
2017-08-23 12:03 ` [PATCHv6 04/19] x86/xen: Provide pre-built page tables only for XEN_PV and XEN_PVH Kirill A. Shutemov
2017-08-23 12:03 ` [PATCHv6 05/19] x86/xen: Drop 5-level paging support code from XEN_PV code Kirill A. Shutemov
2017-08-23 12:03 ` [PATCHv6 06/19] x86/boot/compressed/64: Detect and handle 5-level paging at boot-time Kirill A. Shutemov
2017-08-23 12:03 ` [PATCHv6 07/19] x86/mm: Make virtual memory layout movable for CONFIG_X86_5LEVEL Kirill A. Shutemov
2017-08-23 12:03 ` [PATCHv6 08/19] x86/mm: Make PGDIR_SHIFT and PTRS_PER_P4D variable Kirill A. Shutemov
2017-08-23 12:03 ` [PATCHv6 09/19] x86/mm: Make MAX_PHYSADDR_BITS and MAX_PHYSMEM_BITS dynamic Kirill A. Shutemov
2017-08-23 12:03 ` [PATCHv6 10/19] x86/mm: Make __PHYSICAL_MASK_SHIFT and __VIRTUAL_MASK_SHIFT dynamic Kirill A. Shutemov
2017-08-23 12:03 ` [PATCHv6 11/19] x86/mm: Make STACK_TOP_MAX dynamic Kirill A. Shutemov
2017-08-23 12:03 ` [PATCHv6 12/19] x86/mm: Adjust virtual address space layout in early boot Kirill A. Shutemov
2017-08-23 12:03 ` [PATCHv6 13/19] x86/mm: Make early boot code support boot-time switching of paging modes Kirill A. Shutemov
2017-08-23 12:03 ` [PATCHv6 14/19] x86/mm: Fold p4d page table layer at runtime Kirill A. Shutemov
2017-08-23 12:03 ` [PATCHv6 15/19] x86/mm: Replace compile-time checks for 5-level with runtime-time Kirill A. Shutemov
2017-08-23 12:03 ` [PATCHv6 16/19] x86/mm: Allow to boot without la57 if CONFIG_X86_5LEVEL=y Kirill A. Shutemov
2017-08-23 12:03 ` [PATCHv6 17/19] x86/xen: Allow XEN_PV and XEN_PVH to be enabled with X86_5LEVEL Kirill A. Shutemov
2017-08-23 12:03 ` [PATCHv6 18/19] x86/mm: Redefine some of page table helpers as macros Kirill A. Shutemov
2017-08-23 12:03 ` [PATCHv6 19/19] x86/mm: Offset boot-time paging mode switching cost Kirill A. Shutemov
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