Hi Andrew, Today's linux-next merge of the akpm-current tree got a conflict in Documentation/sysctl/kernel.txt between commit e164ade07b21 ("watchdog: add watchdog_exclude sysctl to assist nohz") from the tile tree and commit 25909f748a50 ("watchdog: update documentation for kernel params and sysctl") from the akpm-current tree. I fixed it up (see below) and can carry the fix as necessary (no action is required). -- Cheers, Stephen Rothwell sfr@canb.auug.org.au diff --cc Documentation/sysctl/kernel.txt index aad9f9ba347c,c831001c45f1..000000000000 --- a/Documentation/sysctl/kernel.txt +++ b/Documentation/sysctl/kernel.txt @@@ -858,15 -904,25 +904,34 @@@ example. If a system hangs up, try pre ============================================================== + watchdog: + + This parameter can be used to disable or enable the soft lockup detector + _and_ the NMI watchdog (i.e. the hard lockup detector) at the same time. + + 0 - disable both lockup detectors + 1 - enable both lockup detectors + + The soft lockup detector and the NMI watchdog can also be disabled or + enabled individually, using the soft_watchdog and nmi_watchdog parameters. + If the watchdog parameter is read, for example by executing + + cat /proc/sys/kernel/watchdog + + the output of this command (0 or 1) shows the logical OR of soft_watchdog + and nmi_watchdog. + + ============================================================== + +watchdog_exclude: + +This value can be used to control on which cpus the watchdog is +prohibited from running. The default exclude mask is empty, but if +NO_HZ_FULL is enabled in the kernel config, and cores are specified +with the nohz_full= boot argument, those cores are excluded by default. + +============================================================== + watchdog_thresh: This value can be used to control the frequency of hrtimer and NMI