#!/bin/bash # -*- coding: utf-8 -*- # # nacl_build.sh -- NaCl library build script # # Copyright (C) 2011 Daniel Borkmann # Copyright (C) 2009-2011 Emmanuel Roullit # # This program is free software; you can redistribute it and/or modify # it under the terms of the GNU General Public License version 2 as # published by the Free Software Foundation. cc="gcc" nacl_dir="/tmp" nacl_version="nacl-20110221" nacl_suffix="tar.bz2" nacl_base_url="http://hyperelliptic.org/nacl" nacl_path="$nacl_dir/$nacl_version.$nacl_suffix" nacl_build_dir="$1" if test -z "$nacl_build_dir"; then echo "Please input the path where NaCl should be build" exit 1 fi if ! test -d "$nacl_build_dir"; then mkdir "$nacl_build_dir" fi wget -O "$nacl_path" "$nacl_base_url/$nacl_version.$nacl_suffix" tar xjf "$nacl_path" -C "$nacl_build_dir" $cc -Wall -O2 ./abiname.c -o ./abiname arch="`./abiname`" shorthostname=$(hostname | sed 's/\..*//' | tr -cd '[a-z][A-Z][0-9]') echo "Building NaCl for arch $arch on host $shorthostname (grab a coffee, this takes a while) ..." cd "$nacl_build_dir"/"$nacl_version" ./do cd $OLDPWD > /dev/null nacl_lib_path="$nacl_build_dir/$nacl_version/build/$shorthostname/lib/$arch" nacl_include_path="$nacl_build_dir/$nacl_version/build/$shorthostname/include/$arch" echo "NaCl lib path $nacl_lib_path" echo "NaCl include path $nacl_include_path" ./nacl_path.sh "$nacl_include_path" "$nacl_lib_path" echo "Done!" >
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authorNicholas Piggin <npiggin@gmail.com>2016-12-25 13:00:30 +1000
committerLinus Torvalds <torvalds@linux-foundation.org>2016-12-25 11:54:48 -0800
commit62906027091f1d02de44041524f0769f60bb9cf3 (patch)
tree6444171af03e463bb0123a392d7b91a0ae6a1f40 /include/net/irda
parent6326fec1122cde256bd2a8c63f2606e08e44ce1d (diff)
mm: add PageWaiters indicating tasks are waiting for a page bit
Add a new page flag, PageWaiters, to indicate the page waitqueue has tasks waiting. This can be tested rather than testing waitqueue_active which requires another cacheline load. This bit is always set when the page has tasks on page_waitqueue(page), and is set and cleared under the waitqueue lock. It may be set when there are no tasks on the waitqueue, which will cause a harmless extra wakeup check that will clears the bit. The generic bit-waitqueue infrastructure is no longer used for pages. Instead, waitqueues are used directly with a custom key type. The generic code was not flexible enough to have PageWaiters manipulation under the waitqueue lock (which simplifies concurrency). This improves the performance of page lock intensive microbenchmarks by 2-3%. Putting two bits in the same word opens the opportunity to remove the memory barrier between clearing the lock bit and testing the waiters bit, after some work on the arch primitives (e.g., ensuring memory operand widths match and cover both bits). Signed-off-by: Nicholas Piggin <npiggin@gmail.com> Cc: Dave Hansen <dave.hansen@linux.intel.com> Cc: Bob Peterson <rpeterso@redhat.com> Cc: Steven Whitehouse <swhiteho@redhat.com> Cc: Andrew Lutomirski <luto@kernel.org> Cc: Andreas Gruenbacher <agruenba@redhat.com> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Mel Gorman <mgorman@techsingularity.net> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'include/net/irda')