[PATCH 1/2] nohz: make updating sleep stats local

This patch is 1/2 of v4 patch set to fix an issue that idle/iowait of /proc/stat can go backward. Originally reported by Tetsuo and Fernando at last year, Mar 2013. [BACKGROUNDS]: idle accounting on NO_HZ If NO_HZ is enabled, cpu stops tick interrupt for itself before go sleep to be idle. It

[PATCH 1/2] nohz: make updating sleep stats local

This patch is 1/2 of v4 patch set to fix an issue that idle/iowait of /proc/stat can go backward. Originally reported by Tetsuo and Fernando at last year, Mar 2013. [BACKGROUNDS]: idle accounting on NO_HZ If NO_HZ is enabled, cpu stops tick interrupt for itself before go sleep to be idle. It