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Date: Tue, 23 Feb 2016 12:53:58 -0500 From: Prarit Bhargava <prarit@...hat.com> To: linux-kernel@...r.kernel.org Cc: Prarit Bhargava <prarit@...hat.com>, Petr Mladek <pmladek@...e.com>, John Stultz <john.stultz@...aro.org>, Xunlei Pang <pang.xunlei@...aro.org>, Thomas Gleixner <tglx@...utronix.de>, Baolin Wang <baolin.wang@...aro.org>, Andrew Morton <akpm@...ux-foundation.org>, Greg Kroah-Hartman <gregkh@...uxfoundation.org>, Petr Mladek <pmladek@...e.cz>, Tejun Heo <tj@...nel.org>, Peter Hurley <peter@...leysoftware.com>, Vasily Averin <vvs@...tuozzo.com>, Joe Perches <joe@...ches.com> Subject: [PATCH 0/2 v6] printk, Add monotonic and real printk timestamps This patchset adds monotonic and real printk timestamps. The first patch changes CONFIG_PRINT_TIME from a bool to an int to allow for the additional timestamps that are added in patch 2. Changes from v6: Petr Mladek pointed out that the current patch fails to indicate to userspace programs which timestamp is being used. Additionally he pointed out that no other config option uses a mix of bool and integers the way CONFIG_PRINTK_TIME would have done after my patch. This results in a patch to modify CONFIG_PRINTK_TIME to switch to int (which includes modifications to config files) and a second patch to implement the new timestamps. Additionally, while testing the dmesg utility I noticed a difference in behaviour between the old CONFIG_PRINTK_TIME=n and CONFIG_PRINTK_TIME=0 (both of which disabled timestamp on the console). In the new case the dmesg output always included 0.000000 timestamp instead of the actual time. I have fixed this by recording (but not writing to the console) the timestamp for 0 and 1 in printk_get_ts() so that dmesg behaves as before. Cc: Petr Mladek <pmladek@...e.com> Cc: John Stultz <john.stultz@...aro.org> Cc: Xunlei Pang <pang.xunlei@...aro.org> Cc: Thomas Gleixner <tglx@...utronix.de> Cc: Baolin Wang <baolin.wang@...aro.org> Cc: Andrew Morton <akpm@...ux-foundation.org> Cc: Greg Kroah-Hartman <gregkh@...uxfoundation.org> Cc: Petr Mladek <pmladek@...e.cz> Cc: Tejun Heo <tj@...nel.org> Cc: Peter Hurley <peter@...leysoftware.com> Cc: Vasily Averin <vvs@...tuozzo.com> Cc: Joe Perches <joe@...ches.com> Signed-off-by: Prarit Bhargava <prarit@...hat.com> Prarit Bhargava (2): lib, switch CONFIG_PRINTK_TIME to int printk, allow different timestamps for printk.time Documentation/kernel-parameters.txt | 6 +- arch/arm/configs/axm55xx_defconfig | 2 +- arch/arm/configs/bcm2835_defconfig | 2 +- arch/arm/configs/bcm_defconfig | 2 +- arch/arm/configs/colibri_pxa270_defconfig | 2 +- arch/arm/configs/colibri_pxa300_defconfig | 2 +- arch/arm/configs/dove_defconfig | 2 +- arch/arm/configs/efm32_defconfig | 2 +- arch/arm/configs/exynos_defconfig | 2 +- arch/arm/configs/ezx_defconfig | 2 +- arch/arm/configs/h5000_defconfig | 2 +- arch/arm/configs/hisi_defconfig | 2 +- arch/arm/configs/imote2_defconfig | 2 +- arch/arm/configs/imx_v6_v7_defconfig | 2 +- arch/arm/configs/keystone_defconfig | 2 +- arch/arm/configs/lpc18xx_defconfig | 2 +- arch/arm/configs/magician_defconfig | 2 +- arch/arm/configs/mmp2_defconfig | 2 +- arch/arm/configs/moxart_defconfig | 2 +- arch/arm/configs/multi_v7_defconfig | 2 +- arch/arm/configs/mvebu_v7_defconfig | 2 +- arch/arm/configs/mxs_defconfig | 2 +- arch/arm/configs/omap2plus_defconfig | 2 +- arch/arm/configs/pxa168_defconfig | 2 +- arch/arm/configs/pxa3xx_defconfig | 2 +- arch/arm/configs/pxa910_defconfig | 2 +- arch/arm/configs/pxa_defconfig | 2 +- arch/arm/configs/qcom_defconfig | 2 +- arch/arm/configs/raumfeld_defconfig | 2 +- arch/arm/configs/shmobile_defconfig | 2 +- arch/arm/configs/socfpga_defconfig | 2 +- arch/arm/configs/stm32_defconfig | 2 +- arch/arm/configs/sunxi_defconfig | 2 +- arch/arm/configs/tegra_defconfig | 2 +- arch/arm/configs/u300_defconfig | 2 +- arch/arm/configs/u8500_defconfig | 2 +- arch/arm/configs/vt8500_v6_v7_defconfig | 2 +- arch/arm/configs/xcep_defconfig | 2 +- arch/arm/configs/zx_defconfig | 2 +- arch/arm64/configs/defconfig | 2 +- arch/mips/configs/bcm47xx_defconfig | 2 +- arch/mips/configs/bmips_be_defconfig | 2 +- arch/mips/configs/bmips_stb_defconfig | 2 +- arch/mips/configs/ci20_defconfig | 2 +- arch/mips/configs/lemote2f_defconfig | 2 +- arch/mips/configs/loongson3_defconfig | 2 +- arch/mips/configs/nlm_xlp_defconfig | 2 +- arch/mips/configs/nlm_xlr_defconfig | 2 +- arch/mips/configs/pistachio_defconfig | 2 +- arch/mips/configs/qi_lb60_defconfig | 2 +- arch/mips/configs/rt305x_defconfig | 2 +- arch/mips/configs/xway_defconfig | 2 +- arch/parisc/configs/generic-64bit_defconfig | 2 +- arch/powerpc/configs/40x/virtex_defconfig | 2 +- arch/powerpc/configs/44x/virtex5_defconfig | 2 +- arch/powerpc/configs/44x/warp_defconfig | 2 +- arch/powerpc/configs/52xx/cm5200_defconfig | 2 +- arch/powerpc/configs/52xx/lite5200b_defconfig | 2 +- arch/powerpc/configs/52xx/motionpro_defconfig | 2 +- arch/powerpc/configs/52xx/tqm5200_defconfig | 2 +- arch/powerpc/configs/gamecube_defconfig | 2 +- arch/powerpc/configs/mpc5200_defconfig | 2 +- arch/powerpc/configs/pasemi_defconfig | 2 +- arch/powerpc/configs/wii_defconfig | 2 +- arch/s390/configs/default_defconfig | 2 +- arch/s390/configs/gcov_defconfig | 2 +- arch/s390/configs/performance_defconfig | 2 +- arch/s390/configs/zfcpdump_defconfig | 2 +- arch/sh/configs/edosk7760_defconfig | 2 +- arch/sh/configs/sdk7786_defconfig | 2 +- arch/sh/configs/se7722_defconfig | 2 +- arch/sh/configs/sh7785lcr_32bit_defconfig | 2 +- arch/sh/configs/urquell_defconfig | 2 +- arch/sparc/configs/sparc64_defconfig | 2 +- arch/x86/configs/i386_defconfig | 2 +- arch/x86/configs/x86_64_defconfig | 2 +- arch/xtensa/configs/audio_kc705_defconfig | 2 +- arch/xtensa/configs/generic_kc705_defconfig | 2 +- arch/xtensa/configs/nommu_kc705_defconfig | 2 +- arch/xtensa/configs/smp_lx200_defconfig | 2 +- include/linux/timekeeping.h | 1 + kernel/printk/printk.c | 76 ++++++++++++++++++++-- kernel/time/timekeeping.c | 13 ++++ lib/Kconfig.debug | 8 ++- .../selftests/rcutorture/configs/lock/CFcommon | 2 +- .../selftests/rcutorture/configs/rcu/CFcommon | 2 +- 86 files changed, 177 insertions(+), 89 deletions(-) -- 1.8.3.1
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