Messages in this thread | | | Subject | Re: [RFC PATCH 0/6] Convert all tasklets to workqueues | From | Steven Rostedt <> | Date | Mon, 25 Jun 2007 22:01:16 -0400 |
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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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