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2013-02-21drivers/video/backlight/Makefile: cleanupAndrew Morton
Fix up indenting. Also alphasort all entries, which reduces patch collisions. Cc: Jingoo Han <jg1.han@samsung.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2013-02-21fb: backlight: add the Himax HX-8357B LCD controllerMaxime Ripard
Signed-off-by: Maxime Ripard <maxime.ripard@free-electrons.com> Cc: Jingoo Han <jg1.han@samsung.com> Cc: Shawn Guo <shawn.guo@linaro.org> Cc: Brian Lilly <brian@crystalfontz.com> Cc: Richard Purdie <rpurdie@rpsys.net> Cc: Florian Tobias Schandinat <FlorianSchandinat@gmx.de> Cc: Grant Likely <grant.likely@secretlab.ca> Cc: Rob Herring <rob.herring@calxeda.com> Cc: Joe Perches <joe@perches.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2013-02-21drivers/video/backlight/ld9040.c: use devm_regulator_bulk_get() APISachin Kamat
devm_regulator_bulk_get is device managed and saves some cleanup and exit code. Signed-off-by: Sachin Kamat <sachin.kamat@linaro.org> Cc: Donghwa Lee <dh09.lee@samsung.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2013-02-21drivers/video/backlight/l4f00242t03.c: convert to devm_regulator_get()Axel Lin
Signed-off-by: Axel Lin <axel.lin@ingics.com> Acked-by: Jingoo Han <jg1.han@samsung.com> Cc: Alberto Panizzo <maramaopercheseimorto@gmail.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2013-02-21drivers/video/backlight/lm3639_bl.c: remove ret = -EIO at error paths of probeDevendra Naga
The APIs are returning correctly the err codes, no need to assign -EIO to the ret again. Signed-off-by: Devendra Naga <devendra.aaru@gmail.com> Acked-by: Daniel Jeong <daniel.jeong@ti.com> Cc: G.Shark Jeong <gshark.jeong@gmail.com> Acked-by: Jingoo Han <jg1.han@samsung.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2013-02-21backlight: corgi_lcd: use lcd_get_data instead of dev_get_drvdataJingoo Han
Use the wrapper function for getting the driver data using lcd_device instead of using dev_get_drvdata with &ld->dev, so we can directly pass a struct lcd_device. Signed-off-by: Jingoo Han <jg1.han@samsung.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2013-02-21backlight: omap1: use bl_get_data instead of dev_get_drvdataJingoo Han
Use the wrapper function for getting the driver data using backlight_device instead of using dev_get_drvdata with &bd->dev, so we can directly pass a struct backlight_device. Signed-off-by: Jingoo Han <jg1.han@samsung.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2013-02-21backlight: tosa: use bl_get_data instead of dev_get_drvdataJingoo Han
Use the wrapper function for getting the driver data using backlight_device instead of using dev_get_drvdata with &bd->dev, so we can directly pass a struct backlight_device. Signed-off-by: Jingoo Han <jg1.han@samsung.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2013-02-21backlight: corgi_lcd: use bl_get_data instead of dev_get_drvdataJingoo Han
Use the wrapper function for getting the driver data using backlight_device instead of using dev_get_drvdata with &bd->dev, so we can directly pass a struct backlight_device. Signed-off-by: Jingoo Han <jg1.han@samsung.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2013-02-21backlight: ams369fg06: use bl_get_data instead of dev_get_drvdataJingoo Han
Use the wrapper function for getting the driver data using backlight_device instead of using dev_get_drvdata with &bd->dev, so we can directly pass a struct backlight_device. Signed-off-by: Jingoo Han <jg1.han@samsung.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2013-02-21pwm_backlight: use bl_get_data instead of dev_get_drvdataJingoo Han
Use the wrapper function for getting the driver data using backlight_device instead of using dev_get_drvdata with &bd->dev, so we can directly pass a struct backlight_device. Signed-off-by: Jingoo Han <jg1.han@samsung.com> Cc: Thierry Reding <thierry.reding@avionic-design.de> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2013-02-21backlight: aat2870: use bl_get_data instead of dev_get_drvdataJingoo Han
Use the wrapper function for getting the driver data using backlight_device instead of using dev_get_drvdata with &bd->dev, so we can directly pass a struct backlight_device. Signed-off-by: Jingoo Han <jg1.han@samsung.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2013-02-21backlight: lms501kf03: use spi_get_drvdata and spi_set_drvdataJingoo Han
Use the wrapper functions for getting and setting the driver data using spi_device instead of using dev_{get|set}_drvdata with &spi->dev, so we can directly pass a struct spi_device. Signed-off-by: Jingoo Han <jg1.han@samsung.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2013-02-21backlight: corgi_lcd: use spi_get_drvdata and spi_set_drvdataJingoo Han
Use the wrapper functions for getting and setting the driver data using spi_device instead of using dev_{get|set}_drvdata with &spi->dev, so we can directly pass a struct spi_device. Signed-off-by: Jingoo Han <jg1.han@samsung.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2013-02-21backlight: tosa: use spi_get_drvdata and spi_set_drvdataJingoo Han
Use the wrapper functions for getting and setting the driver data using spi_device instead of using dev_{get|set}_drvdata with &spi->dev, so we can directly pass a struct spi_device. Signed-off-by: Jingoo Han <jg1.han@samsung.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2013-02-21backlight: vgg2432a4: use spi_get_drvdata and spi_set_drvdataJingoo Han
Use the wrapper functions for getting and setting the driver data using spi_device instead of using dev_{get|set}_drvdata with &spi->dev, so we can directly pass a struct spi_device. Signed-off-by: Jingoo Han <jg1.han@samsung.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2013-02-21backlight: ams369fg06: use spi_get_drvdata and spi_set_drvdataJingoo Han
Use the wrapper functions for getting and setting the driver data using spi_device instead of using dev_{get|set}_drvdata with &spi->dev, so we can directly pass a struct spi_device. Signed-off-by: Jingoo Han <jg1.han@samsung.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2013-02-21backlight: lms283gf05: use spi_get_drvdata and spi_set_drvdataJingoo Han
Use the wrapper functions for getting and setting the driver data using spi_device instead of using dev_{get|set}_drvdata with &spi->dev, so we can directly pass a struct spi_device. Signed-off-by: Jingoo Han <jg1.han@samsung.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2013-02-21backlight: tdo24m: use spi_get_drvdata and spi_set_drvdataJingoo Han
Use the wrapper functions for getting and setting the driver data using spi_device instead of using dev_{get|set}_drvdata with &spi->dev, so we can directly pass a struct spi_device. Signed-off-by: Jingoo Han <jg1.han@samsung.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2013-02-21backlight: ltv350qv: use spi_get_drvdata and spi_set_drvdataJingoo Han
Use the wrapper functions for getting and setting the driver data using spi_device instead of using dev_{get|set}_drvdata with &spi->dev, so we can directly pass a struct spi_device. Signed-off-by: Jingoo Han <jg1.han@samsung.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2013-02-21backlight: s6e63m0: use spi_get_drvdata and spi_set_drvdataJingoo Han
Use the wrapper functions for getting and setting the driver data using spi_device instead of using dev_{get|set}_drvdata with &spi->dev, so we can directly pass a struct spi_device Signed-off-by: Jingoo Han <jg1.han@samsung.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2013-02-21backlight: ld9040: use spi_get_drvdata and spi_set_drvdataJingoo Han
Use the wrapper functions for getting and setting the driver data using spi_device instead of using dev_{get|set}_drvdata with &spi->dev, so we can directly pass a struct spi_device. Signed-off-by: Jingoo Han <jg1.han@samsung.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2013-02-21backlight: l4f00242t03: use spi_get_drvdata and spi_set_drvdataJingoo Han
Use the wrapper functions for getting and setting the driver data using spi_device instead of using dev_{get|set}_drvdata with &spi->dev, so we can directly pass a struct spi_device. Signed-off-by: Jingoo Han <jg1.han@samsung.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2013-02-21backlight: ams369fg06: reorder inclusions of <linux/xxx.h>Jingoo Han
Reorder inclusions of <linux/xxx.h> for redability, according to alphabetical ordering. Also, unnecessary header comments are removed. Signed-off-by: Jingoo Han <jg1.han@samsung.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2013-02-21backlight: ams369fg06: remove redundant variable 'before_power'Jingoo Han
'before_power' was used to check the previous status when resume() is called. However, FB_BLANK_POWERDOWN was used in suspend() all the time, so there is no need to check the previous status. Also, redundant return variables are removed to reduce the code. Signed-off-by: Jingoo Han <jg1.han@samsung.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2013-02-21backlight: ams369fg06: replace EFAULT with EINVALJingoo Han
Replace EFAULT with EINVAL, because EFAULT tends to be for the invalid memory addresses. Signed-off-by: Jingoo Han <jg1.han@samsung.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2013-02-21backlight: ams369fg06: remove unnecessary NULL deference checkJingoo Han
Remove unnecessary NULL deference check, because it was already checked in ams369fg06_probe(). Also, unnecessary parentheses are removed in ams369fg06_power_is_on(). Signed-off-by: Jingoo Han <jg1.han@samsung.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2013-02-21backlight: ams369fg06: use sleep instead of delayJingoo Han
Replace mdelay with msleep to remove the busy loop waiting. Signed-off-by: Jingoo Han <jg1.han@samsung.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2013-02-21backlight: s6e63m0: reorder inclusions of <linux/xxx.h>Jingoo Han
Reorder inclusions of <linux/xxx.h> for redability, according to alphabetical ordering. Also, unnecessary header comments are removed. Signed-off-by: Jingoo Han <jg1.han@samsung.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2013-02-21backlight: s6e63m0: remove redundant variable 'before_power'Jingoo Han
'before_power' was used to check the previous status when resume() is called. However, FB_BLANK_POWERDOWN was used in suspend() all the time, so there is no need to check the previous status. Also, redundant return variables are removed to reduce the code. Signed-off-by: Jingoo Han <jg1.han@samsung.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2013-02-21backlight: s6e63m0: replace EFAULT with EINVALJingoo Han
Replace EFAULT with EINVAL, because EFAULT tends to be for the invalid memory addresses. Signed-off-by: Jingoo Han <jg1.han@samsung.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2013-02-21backlight: s6e63m0: remove unnecessary NULL deference checkJingoo Han
Remove unnecessary NULL deference check, because it was already checked in s6e63m0_probe(). Also, POWER_IS_ON is replaced with s6e63m0_power_is_on(). Signed-off-by: Jingoo Han <jg1.han@samsung.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2013-02-21backlight: s6e63m0: use sleep instead of delayJingoo Han
Replace mdelay with msleep to remove the busy loop waiting. Signed-off-by: Jingoo Han <jg1.han@samsung.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2013-02-21backlight: s6e63m0: use lowercase names of structsJingoo Han
Lowercase names of structs should be used, because they are not preprocessor macros. Signed-off-by: Jingoo Han <jg1.han@samsung.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2013-02-21backlight: ld9040: reorder inclusions of <linux/xxx.h>Jingoo Han
Reorder inclusions of <linux/xxx.h> for redability, according to alphabetical ordering. Also, unnecessary header comments are removed. Signed-off-by: Jingoo Han <jg1.han@samsung.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2013-02-21backlight: ld9040: remove redundant return variablesJingoo Han
Redundant return variables are removed to reduce the code. Signed-off-by: Jingoo Han <jg1.han@samsung.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2013-02-21backlight: ld9040: replace EFAULT with EINVALJingoo Han
Replace EFAULT with EINVAL, because EFAULT tends to be for the invalid memory addresses. Signed-off-by: Jingoo Han <jg1.han@samsung.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2013-02-21backlight: ld9040: remove unnecessary NULL deference checkJingoo Han
Removee unnecessary NULL deference check, because it was already checked in ld9040_probe(). Also, power_is_on is replaced with ld9040_power_is_on(). Signed-off-by: Jingoo Han <jg1.han@samsung.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2013-02-21backlight: ld9040: use sleep instead of delayJingoo Han
Replace mdelay with msleep to remove the busy loop waiting. Signed-off-by: Jingoo Han <jg1.han@samsung.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2013-02-21backlight: add lms501kf03 LCD driverJingoo Han
Add the lms501kf03 LCD panel driver. The lms501kf03 LCD panel (800 x 480) driver uses 3-wired SPI inteface. [akpm@linux-foundation.org: remove unused variable `before_power'] [akpm@linux-foundation.org: make lms501kf03_shutdown() static, per Fengguang] Signed-off-by: Ilho Lee <Ilho215.lee@samsung.com> Signed-off-by: Jingoo Han <jg1.han@samsung.com> Cc: "devendra.aaru" <devendra.aaru@gmail.com> Cc: Sachin Kamat <sachin.kamat@linaro.org> Cc: Wu Fengguang <fengguang.wu@intel.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2013-02-21MAINTAINERS: mm: add additional include files to listingCody P Schafer
Add gfp.h, mmzone.h, memory_hotplug.h & vmalloc.h to the "MEMORY MANAGMENT" section so scripts/get_maintainer.pl can do a better job of making recommendations. Signed-off-by: Cody P Schafer <cody@linux.vnet.ibm.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2013-02-21get_maintainer.pl: find maintainers for removed filesGeert Uytterhoeven
For removed files, get_maintainer.pl doesn't find any maintainers (besides the default linux-kernel@vger.kernel.org), as it only looks at the "+++" lines, which are "/dev/null" for removals. Fix this by extending the parsing to the "---" lines. E.g. for the two line test patch below the real score maintainers will now be found: --- a/arch/score/include/asm/dma-mapping.h +++ /dev/null Signed-off-by: Geert Uytterhoeven <geert@linux-m68k.org> Cc: Joe Perches <joe@perches.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2013-02-21printk: add pr_devel_once and pr_devel_ratelimitedMikhail Gruzdev
Standardize pr_devel logging macros family by adding pr_devel_once and pr_devel_ratelimited. Signed-off-by: Mikhail Gruzdev <michail.gruzdev@gmail.com> Acked-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2013-02-21lib/vsprintf.c: add %pa format specifier for phys_addr_t typesStepan Moskovchenko
Add the %pa format specifier for printing a phys_addr_t type and its derivative types (such as resource_size_t), since the physical address size on some platforms can vary based on build options, regardless of the native integer type. Signed-off-by: Stepan Moskovchenko <stepanm@codeaurora.org> Cc: Rob Landley <rob@landley.net> Cc: George Spelvin <linux@horizon.com> Cc: Andy Shevchenko <andriy.shevchenko@linux.intel.com> Cc: Stephen Boyd <sboyd@codeaurora.org> Cc: Andrei Emeltchenko <andrei.emeltchenko@intel.com> Cc: Ingo Molnar <mingo@elte.hu> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2013-02-21sys_prctl(): coding-style cleanupAndrew Morton
Remove a tabstop from the switch statement, in the usual fashion. A few instances of weirdwrapping were removed as a result. Cc: Chen Gang <gang.chen@asianux.com> Cc: Cyrill Gorcunov <gorcunov@openvz.org> Acked-by: Kees Cook <keescook@chromium.org> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2013-02-21sys_prctl(): arg2 is unsigned long which is never < 0Chen Gang
arg2 will never < 0, for its type is 'unsigned long' Also, use the provided macros. Signed-off-by: Chen Gang <gang.chen@asianux.com> Reported-by: Cyrill Gorcunov <gorcunov@openvz.org> Acked-by: Kees Cook <keescook@chromium.org> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2013-02-21sun.com documentation fixesChristian Kujau
After I came across a help text for SUNGEM mentioning a broken sun.com URL, I felt like fixing those up, as they are now pointing to oracle.com URLs. Signed-off-by: Christian Kujau <lists@nerdbynature.de> Acked-by: David S. Miller <davem@davemloft.net> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2013-02-21lib/Kconfig.debug: unhide CONFIG_PANIC_ON_OOPSKyle McMartin
CONFIG_EXPERT doesn't really make sense, and hides it unintentionally. Remove superfluous "default n" pointed out by Ingo as well. Signed-off-by: Kyle McMartin <kyle@redhat.com> Acked-by: Ingo Molnar <mingo@kernel.org> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2013-02-21smp: make smp_call_function_many() use logic similar to ↵Shaohua Li
smp_call_function_single() I'm testing swapout workload in a two-socket Xeon machine. The workload has 10 threads, each thread sequentially accesses separate memory region. TLB flush overhead is very big in the workload. For each page, page reclaim need move it from active lru list and then unmap it. Both need a TLB flush. And this is a multthread workload, TLB flush happens in 10 CPUs. In X86, TLB flush uses generic smp_call)function. So this workload stress smp_call_function_many heavily. Without patch, perf shows: + 24.49% [k] generic_smp_call_function_interrupt - 21.72% [k] _raw_spin_lock - _raw_spin_lock + 79.80% __page_check_address + 6.42% generic_smp_call_function_interrupt + 3.31% get_swap_page + 2.37% free_pcppages_bulk + 1.75% handle_pte_fault + 1.54% put_super + 1.41% grab_super_passive + 1.36% __swap_duplicate + 0.68% blk_flush_plug_list + 0.62% swap_info_get + 6.55% [k] flush_tlb_func + 6.46% [k] smp_call_function_many + 5.09% [k] call_function_interrupt + 4.75% [k] default_send_IPI_mask_sequence_phys + 2.18% [k] find_next_bit swapout throughput is around 1300M/s. With the patch, perf shows: - 27.23% [k] _raw_spin_lock - _raw_spin_lock + 80.53% __page_check_address + 8.39% generic_smp_call_function_single_interrupt + 2.44% get_swap_page + 1.76% free_pcppages_bulk + 1.40% handle_pte_fault + 1.15% __swap_duplicate + 1.05% put_super + 0.98% grab_super_passive + 0.86% blk_flush_plug_list + 0.57% swap_info_get + 8.25% [k] default_send_IPI_mask_sequence_phys + 7.55% [k] call_function_interrupt + 7.47% [k] smp_call_function_many + 7.25% [k] flush_tlb_func + 3.81% [k] _raw_spin_lock_irqsave + 3.78% [k] generic_smp_call_function_single_interrupt swapout throughput is around 1400M/s. So there is around a 7% improvement, and total cpu utilization doesn't change. Without the patch, cfd_data is shared by all CPUs. generic_smp_call_function_interrupt does read/write cfd_data several times which will create a lot of cache ping-pong. With the patch, the data becomes per-cpu. The ping-pong is avoided. And from the perf data, this doesn't make call_single_queue lock contend. Next step is to remove generic_smp_call_function_interrupt() from arch code. Signed-off-by: Shaohua Li <shli@fusionio.com> Cc: Peter Zijlstra <a.p.zijlstra@chello.nl> Cc: Ingo Molnar <mingo@elte.hu> Cc: Steven Rostedt <rostedt@goodmis.org> Cc: Jens Axboe <axboe@kernel.dk> Cc: Linus Torvalds <torvalds@linux-foundation.org> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2013-02-21mm: use vm_unmapped_area() on alpha architectureMichel Lespinasse
Update the alpha arch_get_unmapped_area function to make use of vm_unmapped_area() instead of implementing a brute force search. Signed-off-by: Michel Lespinasse <walken@google.com> Acked-by: Rik van Riel <riel@redhat.com> Cc: Richard Henderson <rth@twiddle.net> Cc: Ivan Kokshaysky <ink@jurassic.park.msu.ru> Cc: Matt Turner <mattst88@gmail.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
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