]> git.baikalelectronics.ru Git - kernel.git/commit
mm/gup: Mark all pages PageReferenced in generic get_user_pages_fast()
authorKirill A. Shutemov <kirill.shutemov@linux.intel.com>
Thu, 16 Mar 2017 15:26:52 +0000 (18:26 +0300)
committerIngo Molnar <mingo@kernel.org>
Sat, 18 Mar 2017 08:48:02 +0000 (09:48 +0100)
commit721b79de17c353d03eb5e5bf64ffad857e4cf424
tree216fc2bf7b18eda3404b4e90786d6e9aed056dda
parentf8f8bcb3ca9de94e50213f2803a3ae2ccbeef4ac
mm/gup: Mark all pages PageReferenced in generic get_user_pages_fast()

This is a preparation patch for the transition of x86 to the generic GUP_fast()
implementation.

Unlike generic GUP_fast(), the x86 version makes all pages it touches
referenced. It seems required for GRU and EPT.

See the following commit:

  43a3a68f06f6 ("thp: mmu_notifier_test_young")

Signed-off-by: Kirill A. Shutemov <kirill.shutemov@linux.intel.com>
Cc: Andrea Arcangeli <aarcange@redhat.com>
Cc: Andrew Morton <akpm@linux-foundation.org>
Cc: Aneesh Kumar K . V <aneesh.kumar@linux.vnet.ibm.com>
Cc: Borislav Petkov <bp@alien8.de>
Cc: Catalin Marinas <catalin.marinas@arm.com>
Cc: Dann Frazier <dann.frazier@canonical.com>
Cc: Dave Hansen <dave.hansen@intel.com>
Cc: H. Peter Anvin <hpa@zytor.com>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Rik van Riel <riel@redhat.com>
Cc: Steve Capper <steve.capper@linaro.org>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: linux-arch@vger.kernel.org
Cc: linux-mm@kvack.org
Link: http://lkml.kernel.org/r/20170316152655.37789-5-kirill.shutemov@linux.intel.com
Signed-off-by: Ingo Molnar <mingo@kernel.org>
mm/gup.c