From: "Antonino A. Daplas" <adaplas@gmail.com>
To: linux-fbdev-devel@lists.sourceforge.net,
Andrey Volkov <andreyvolkov@users.sourceforge.net>
Subject: Re: hwd accel framebuffer: Newbi question (sleep in sync)
Date: Fri, 22 Jul 2005 11:58:19 +0800 [thread overview]
Message-ID: <200507221158.20147.adaplas@gmail.com> (raw)
In-Reply-To: <42D22809.8070800@users.sourceforge.net>
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
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next prev parent reply other threads:[~2005-07-22 5:02 UTC|newest]
Thread overview: 3+ messages / expand[flat|nested] mbox.gz Atom feed top
2005-07-11 8:04 hwd accel framebuffer: Newbi question (sleep in sync) Andrey Volkov
2005-07-22 3:58 ` Antonino A. Daplas [this message]
-- strict thread matches above, loose matches on Subject: below --
2005-07-11 8:19 Andrey Volkov
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