search for: rtc_timer_update

...M based program in IE browser in my Virtual Machine, I have found clearly that time at the right bottom corner in my VM gets more slower and slower. I studied the bug deeply, and found something below. 2 Xen vmx_vmexit_handler --> ......... --> handle_rtc_io --> rtc_ioport_write --> rtc_timer_update --> set RTC's REG_A to a high rate--> create_periodic_time(disable the former timer, and init a new one) Win7 is installed in the vm. This calling path is executed so frequent that may come down to set the RTC's REG_A hundreds of times every second but with the same rate(976.562us(102...

...efore reverted. This series consists of the broken up pieces that - according to my testing - don''t expose the reported lockup; the 7th will need debugging to understand what''s wrong there. 1: use RTC_* names instead of literal numbers 2: consolidate toggling of RTC IRQ 3: adjust rtc_timer_update() 4: fix RTC hour conversions 5: used cached original value in RTC_REG_B writing code 6: generalize IRQ raising on RTC_REG_B writes Signed-off-by: Jan Beulich <jbeulich@suse.com>