(Sorry for replying to my own post so soon)

* On 2007-11-24 Ico Doornekamp [off-list ref] wrote  :

It's very similar to the hecubafb driver, and uses deferred IO.

Anyway, it is *supposed* to use deferred IO, but I suspect this is where
my problem is. If I understand right, the fb_defio code should handle
the mmap()ing of the framebuffer device for me, and run my callback
whenever a write occured to the fb memory. I guess something is not
right here, since the callback never gets to run when doing mmap() from
userspace, or when using the fbcon module. 

Is the deferred IO code currently known to work properly ?

Thanks again,

Ico

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