Re: [RFC PATCH 0/6] Convert all tasklets to workqueues

[Steven Rostedt]

On Mon, 2007-06-25 at 18:46 -0700, Dan Williams wrote:
> 
> Context switches on this platform flush the L1 cache so bouncing
> between a workqueue and the MD thread is painful.

Why is context switches between two kernel threads flushing the L1
cache?  Is this a flaw in the ARM arch?  I would think the only thing
that needs to be done between a context switch of two kernel threads (or
even a user thread to a kernel thread) is update the general regs and
stack. The memory access (page_tables or whatever ARM uses) should stay
the same.

Perhaps something else is at fault here.

Thanks for testing!

-- Steve


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