Re: [Linux-fbdev-devel] hwd accel framebuffer: Newbi question (sleep in sync)

[Antonino A. D. <ad...@gm...>]

On Monday 11 July 2005 16:04, Andrey Volkov wrote:
> Hi all,
>
> Anyone could explain me, could I or couldn't
> use process sleep (i.e. wait_for..., sleep_on...)
> in fb_info->fb_sync and/or in any hwd accelerated routines (i.e. blit,
> cursor and rectfill)?

No, in general, it's not safe to sleep in some of the fb_xxx routines,
especially when fbdev is used by fbcon.

> Code, which now in kernel, look terrible for me (counter based pooling).
> Must it be so?

Yes, because of the above reason. A few drivers though test a "can_sleep"
flag and alter behavior between looping and sleeping.

Tony