From: Dmitry Torokhov <dmitry.torokhov@gmail.com>
To: Pavel Machek <pavel@ucw.cz>
Cc: kernel list <linux-kernel@vger.kernel.org>, linux-input@vger.kernel.org
Subject: Re: select() on /dev/input/eventX not level-triggered?
Date: Mon, 23 May 2011 11:13:12 -0700 [thread overview]
Message-ID: <20110523181312.GA20438@core.coreip.homeip.net> (raw)
In-Reply-To: <20110519235051.GA9782@elf.ucw.cz>
On Fri, May 20, 2011 at 01:50:51AM +0200, Pavel Machek wrote:
> Hi!
>
> I'm debugging strange behaviour on /dev/input/eventX ... it seems that
> select is not behaving level-triggered as it apparently should. I can
> reproduce it when hitting windows & alt keys.
>
> Now, I really should rewrite it into C, first, but perhaps someone has
> an idea?
Is this with next or with mainline? In next we try not to signal that FD
is ready unless we have full packet in the buffer...
FWIW I see python indeed not reading the tail of events (btw the format
should be 'llhhi' and the size on 64 bit arches is 24, not 16) but when
I hacked evtest to use select and non-blockign read it all worked
properly.
Thanks.
--
Dmitry
next prev parent reply other threads:[~2011-05-23 18:13 UTC|newest]
Thread overview: 5+ messages / expand[flat|nested] mbox.gz Atom feed top
2011-05-19 23:50 select() on /dev/input/eventX not level-triggered? Pavel Machek
2011-05-23 18:13 ` Dmitry Torokhov [this message]
2011-05-23 20:06 ` Pavel Machek
2011-05-23 20:49 ` Dmitry Torokhov
2011-05-23 21:20 ` Pavel Machek
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