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From: Joerg Roedel <joro@8bytes.org>
To: x86@kernel.org
Cc: hpa@zytor.com, Dave Hansen <dave.hansen@linux.intel.com>,
	Andy Lutomirski <luto@kernel.org>,
	Peter Zijlstra <peterz@infradead.org>,
	Andrew Morton <akpm@linux-foundation.org>,
	Steven Rostedt <rostedt@goodmis.org>,
	joro@8bytes.org, linux-kernel@vger.kernel.org,
	linux-mm@kvack.org
Subject: [PATCH v2 0/3] x86/mm/64: Remove vmalloc/ioremap pgtable synchronization
Date: Wed,  1 Jul 2020 10:38:35 +0200
Message-ID: <20200701083839.19193-1-joro@8bytes.org> (raw)

Hi,

here is a small patch-set to implement pre-allocation of the P4D/PUD
pages in the vmalloc/ioremap area of the address space. This allows to
remove the synchronization of these mappings for x86-64 and unexporting
the sync_global_pgds() function.

Please review.

Thanks,

	Joerg

Changes to v1:

	- Made failure at pre-allocation stage fatal
	- As a consequence removed the arch_sync_kernel_mappings()
	  implementation for x86-64
	- Unexported sync_global_pgds()
	- Removed some left-over debug code from the first patch

Joerg Roedel (3):
  x86/mm/64: Pre-allocate p4d/pud pages for vmalloc area
  x86/mm/64: Do not sync vmalloc/ioremap mappings
  x86/mm/64: Make sync_global_pgds() static

 arch/x86/include/asm/pgtable_64.h       |  2 -
 arch/x86/include/asm/pgtable_64_types.h |  2 -
 arch/x86/mm/init_64.c                   | 59 ++++++++++++++++++++++---
 3 files changed, 53 insertions(+), 10 deletions(-)

-- 
2.17.1



             reply index

Thread overview: 4+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2020-07-01  8:38 Joerg Roedel [this message]
2020-07-01  8:38 ` [PATCH v2 1/3] x86/mm/64: Pre-allocate p4d/pud pages for vmalloc area Joerg Roedel
2020-07-01  8:38 ` [PATCH v2 2/3] x86/mm/64: Do not sync vmalloc/ioremap mappings Joerg Roedel
2020-07-01  8:38 ` [PATCH v2 3/3] x86/mm/64: Make sync_global_pgds() static Joerg Roedel

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