On Mon, Feb 17, 2025 at 08:24:34PM +0000, jaywang-amazon wrote:
From: David Woodhouse dwmw@amazon.co.uk
[upstream commit 70e6b7d9ae3c63df90a7bba7700e8d5c300c360]
Leaving the PIT interrupt running can cause noticeable steal time for virtual guests. The VMM generally has a timer which toggles the IRQ input to the PIC and I/O APIC, which takes CPU time away from the guest. Even on real hardware, running the counter may use power needlessly (albeit not much).
Make sure it's turned off if it isn't going to be used.
Signed-off-by: David Woodhouse dwmw@amazon.co.uk Signed-off-by: Thomas Gleixner tglx@linutronix.de Tested-by: Michael Kelley mhkelley@outlook.com Link: https://lore.kernel.org/all/20240802135555.564941-1-dwmw2@infradead.org
(cherry picked from commit 70e6b7d9ae3c63df90a7bba7700e8d5c300c3c60)
Cc: stable@vger.kernel.org # v5.15
Signed-off-by: jaywang-amazon wanjay@amazon.com
Why all the blank space here?
And why not cc: all of the people who did this patch on it?
Also your name needs to be fixed up.
Please work with your coworkers on getting this all right so we don't have to do this type of basic reviewing for you. All of your recent backprots suffer from this and can not be taken, sorry.
greg k-h