C1E auto-promotion suspend/resume

From: Andy Lutomirski
Date: Sun Mar 13 2016 - 21:39:33 EST

Next message: Fengguang Wu: "Re: [kbuild-all] drivers/vhost/vhost.c:718:3: error: call to '__compiletime_assert_718' declared with attribute error: BUILD_BUG_ON failed: __alignof__ *vq->avail > VRING_AVAIL_ALIGN_SIZE"
Previous message: Sergey Senozhatsky: "Re: [PATCH v6 2/2] printk: Make printing of spin_dump() deferred to avoid a deadlock"
Next in thread: Brown, Len: "RE: C1E auto-promotion suspend/resume"
Messages sorted by: [ date ] [ thread ] [ subject ] [ author ]

Hi-

By BIOS (1.2.3 on a Dell XPS 13 9350) seems to want to enable C1E
auto-promotion (ugh!), which results in this difference across
suspend/resume according to turbostat:

-cpu3: MSR_IA32_POWER_CTL: 0x0024005d (C1E auto-promotion: DISabled)
+cpu3: MSR_IA32_POWER_CTL: 0x0024005f (C1E auto-promotion: ENabled)

Should intel_idle learn to re-disable idle promotion on resume?

--Andy

Next message: Fengguang Wu: "Re: [kbuild-all] drivers/vhost/vhost.c:718:3: error: call to '__compiletime_assert_718' declared with attribute error: BUILD_BUG_ON failed: __alignof__ *vq->avail > VRING_AVAIL_ALIGN_SIZE"
Previous message: Sergey Senozhatsky: "Re: [PATCH v6 2/2] printk: Make printing of spin_dump() deferred to avoid a deadlock"
Next in thread: Brown, Len: "RE: C1E auto-promotion suspend/resume"
Messages sorted by: [ date ] [ thread ] [ subject ] [ author ]