Re: [PATCH] Don't panic when EEH_MAX_FAILS is exceeded

On Sun, 20 Jul 2008 15:17:08 -0500
"Nathan Lynch" [off-list ref] wrote:

Sean MacLennan wrote:

quoted

Why can you not msleep within a spinlock? And when was this change
brought in?

Giving up the cpu while holding a spinlock risks locking up the system
in the worst case -- if another task tries to acquire the held lock it
can spin indefinitely.

I guess I am too x86 centric. On the x86 an msleep does not give up the
CPU. It does a busy wait.

So what sleep do you use on the PowerPC when you need a delay for
hardware reasons?

Cheers,
   Sean