Ingo Molnar <mingo@elte.hu> wrote:

quoted text
> so how about the following, different approach: anyone who has a tasklet 
> in any performance-sensitive codepath, please yell now.

The cafe_ccic (OLPC) camera driver uses a tasklet to move frames out of
the DMA buffers in the streaming I/O path.  With this change in place,
I'd worry that the possibility of dropping frames would increase,
especially considering that (1) this is running on OLPC hardware, and 
(2) there is typically a streaming video application running in user
space. 

Obviously some testing is called for here.  I will make an attempt to do
that testing, but the next few weeks involve some insane travel which
will make that hard.  Stay tuned.

Thanks,

jon

Jonathan Corbet / LWN.net / corbet@lwn.net
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