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authorKirill A. Shutemov <kirill.shutemov@linux.intel.com>2017-11-18 00:31:22 +0100
committerLinus Torvalds <torvalds@linux-foundation.org>2017-11-18 01:10:04 +0100
commit64c349f4ae78723248c474531d0cbc524fc5ba77 (patch)
treeb8284ccb8224f9f4023d5b4c1caa6bc053a2c90f /drivers/watchdog/intel_scu_watchdog.c
parentsysvipc: make get_maxid O(1) again (diff)
downloadlinux-64c349f4ae78723248c474531d0cbc524fc5ba77.tar.xz
linux-64c349f4ae78723248c474531d0cbc524fc5ba77.zip
mm: add infrastructure for get_user_pages_fast() benchmarking
Performance of get_user_pages_fast() is critical for some workloads, but it's tricky to test it directly. This patch provides /sys/kernel/debug/gup_benchmark that helps with testing performance of it. See tools/testing/selftests/vm/gup_benchmark.c for userspace counterpart. Link: http://lkml.kernel.org/r/20170908215603.9189-2-kirill.shutemov@linux.intel.com Signed-off-by: Kirill A. Shutemov <kirill.shutemov@linux.intel.com> Cc: Shuah Khan <shuah@kernel.org> Cc: Ingo Molnar <mingo@kernel.org> Cc: Thorsten Leemhuis <regressions@leemhuis.info> Cc: Jonathan Corbet <corbet@lwn.net> Cc: Huang Ying <ying.huang@intel.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'drivers/watchdog/intel_scu_watchdog.c')
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