linux-kernel - Re: [PATCH 0/3] input: evdev: Dynamic buffers (rev4)

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Message-ID: <4C174B31.6040403@euromail.se>
Date:	Tue, 15 Jun 2010 11:43:13 +0200
From:	Henrik Rydberg <rydberg@...omail.se>
To:	Dmitry Torokhov <dmitry.torokhov@...il.com>
CC:	linux-input@...r.kernel.org, linux-kernel@...r.kernel.org,
	Jiri Kosina <jkosina@...e.cz>,
	Mika Kuoppala <mika.kuoppala@...ia.com>,
	Benjamin Tissoires <tissoire@...a.fr>,
	Rafi Rubin <rafi@...s.upenn.edu>
Subject: Re: [PATCH 0/3] input: evdev: Dynamic buffers (rev4)

Dmitry Torokhov wrote:
> On Saturday, June 05, 2010 04:04:26 am Henrik Rydberg wrote:
>> Dmitry,
>>
>> Please find enclosed the fourth version of the evdev buffer patches.
>>
>> This version implements buffer locking using event_lock as you
>> suggested, such that we can proceed with fixing the evdev buffer
>> problem independently from providing a suitable one-to-many buffer.
>>
>> The first patch converts the per-client buffers to a common buffer,
>> and adds a fixme since the code is expected to be further
>> improved. The second and third patch includes your review comments.
> 
> Henrik,
> 
> Applied to .36 queue with minor adjustments, please take a peek in my
> 'for-linus' branch and see if you spot anything wrong.

We are talking about your tree @kernel.org, right? Nothing appeared there...

> The changes have
> been made with an eye of implementing a per-client event filters which
> would again require using private event queues (but only by clients that
> request filtering).

Would not having the separate reader tails suffice? Implementing the filtering
during client read?

> The desire for allowing event filtering in kernel is to avoid waking up
> HAL-ish processes (ones that only interested in certain special events, 
> like KEY_SUSPEND, KEY_WIFI, KEY_MUTE, etc) needlessly. Not sure if I am
> going to have time to actually implement it though, anyone wants to
> take a stab?

I see. Something like a lovely new ioctl() command, setting the evbits on a per
client basis?

Henrik

--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@...r.kernel.org
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/