From: Jiri Kosina <jkosina@suse.cz>
To: Henrik Rydberg <rydberg@euromail.se>
Cc: Dmitry Torokhov <dmitry.torokhov@gmail.com>,
linux-input@vger.kernel.org, linux-kernel@vger.kernel.org
Subject: Re: [PATCH v3 16/20] HID: Only dump input if someone is listening
Date: Sun, 2 Sep 2012 09:28:26 +0200 (CEST) [thread overview]
Message-ID: <alpine.LNX.2.00.1209020927130.20709@pobox.suse.cz> (raw)
In-Reply-To: <1346528835-363-17-git-send-email-rydberg@euromail.se>
On Sat, 1 Sep 2012, Henrik Rydberg wrote:
> Going through the motions of printing the debug message information
> takes a long time; using the keyboard can lead to a 160 us irqsoff
> latency. This patch skips hid_dump_input() when there are no open
> handles, which brings latency down to 100 us.
>
> Signed-off-by: Henrik Rydberg <rydberg@euromail.se>
> ---
> drivers/hid/hid-core.c | 3 ++-
> 1 file changed, 2 insertions(+), 1 deletion(-)
>
> diff --git a/drivers/hid/hid-core.c b/drivers/hid/hid-core.c
> index 60ea284..5b74e78 100644
> --- a/drivers/hid/hid-core.c
> +++ b/drivers/hid/hid-core.c
> @@ -996,7 +996,8 @@ static void hid_process_event(struct hid_device *hid, struct hid_field *field,
> struct hid_driver *hdrv = hid->driver;
> int ret;
>
> - hid_dump_input(hid, usage, value);
> + if (!list_empty(&hid->debug_list))
> + hid_dump_input(hid, usage, value);
>
> if (hdrv && hdrv->event && hid_match_usage(hid, usage)) {
> ret = hdrv->event(hid, field, usage, value);
Henrik,
I have applied this one right away, so you can drop it from your series.
The remaining ones I am still about to review (currently travelling).
There is no inter-dependency between the Input and HID ones, and so we can
handle them with Dmitry as two independent Input and HID series, right?
Thanks a lot,
--
Jiri Kosina
SUSE Labs
next prev parent reply other threads:[~2012-09-02 7:28 UTC|newest]
Thread overview: 49+ messages / expand[flat|nested] mbox.gz Atom feed top
2012-09-01 19:46 [PATCH v3 v3 00/20] Input and HID updates for 3.7 Henrik Rydberg
2012-09-01 19:46 ` [PATCH v3 01/20] Input: Break out MT data Henrik Rydberg
2012-09-13 5:15 ` Dmitry Torokhov
2012-09-13 17:58 ` Henrik Rydberg
2012-09-01 19:46 ` [PATCH v3 02/20] Input: Improve the events-per-packet estimate Henrik Rydberg
2012-09-13 5:16 ` Dmitry Torokhov
2012-09-01 19:46 ` [PATCH v3 03/20] Input: Make sure we follow all EV_KEY events Henrik Rydberg
2012-09-13 5:19 ` Dmitry Torokhov
2012-09-01 19:46 ` [PATCH v3 04/20] Input: Move autorepeat to the event-passing phase Henrik Rydberg
2012-09-01 19:47 ` [PATCH v3 05/20] Input: Send events one packet at a time Henrik Rydberg
2012-09-13 6:56 ` Dmitry Torokhov
2012-09-13 17:59 ` Henrik Rydberg
2012-09-01 19:47 ` [PATCH v3 06/20] Input: evdev - Add the events() callback Henrik Rydberg
2012-09-01 19:47 ` [PATCH v3 07/20] Input: MT - Add flags to input_mt_init_slots() Henrik Rydberg
2012-09-01 19:47 ` [PATCH v3 08/20] Input: MT - Handle frame synchronization in core Henrik Rydberg
2012-09-01 19:47 ` [PATCH v3 09/20] Input: MT - Add in-kernel tracking Henrik Rydberg
2012-09-01 19:47 ` [PATCH v3 10/20] Input: MT - Get slot by key Henrik Rydberg
2012-09-01 19:47 ` [PATCH v3 11/20] Input: bcm5974 - only setup button urb for TYPE1 devices Henrik Rydberg
2012-09-01 19:47 ` [PATCH v3 12/20] Input: bcm5974 - Preparatory renames Henrik Rydberg
2012-09-01 19:47 ` [PATCH v3 13/20] Input: bcm5974 - Drop pressure and width emulation Henrik Rydberg
2012-09-13 6:57 ` Dmitry Torokhov
2012-09-13 18:41 ` Henrik Rydberg
2012-09-01 19:47 ` [PATCH v3 14/20] Input: bcm5974 - Drop the logical dimensions Henrik Rydberg
2012-09-01 19:47 ` [PATCH v3 15/20] Input: bcm5974 - Convert to MT-B Henrik Rydberg
2012-09-01 19:47 ` [PATCH v3 16/20] HID: Only dump input if someone is listening Henrik Rydberg
2012-09-02 7:28 ` Jiri Kosina [this message]
2012-09-02 8:52 ` Henrik Rydberg
2012-09-03 13:17 ` Jiri Kosina
2012-09-06 20:57 ` Henrik Rydberg
2012-09-07 1:54 ` Ping Cheng
2012-09-07 12:52 ` Jiri Kosina
2012-09-10 19:02 ` Henrik Rydberg
2012-09-10 20:49 ` Jiri Kosina
2012-09-10 21:12 ` Dmitry Torokhov
2012-09-14 19:25 ` Henrik Rydberg
2012-09-15 15:33 ` Input and HID updates for 3.7, version 4 Henrik Rydberg
2012-09-18 11:29 ` Jiri Kosina
2012-09-18 16:19 ` Henrik Rydberg
2012-09-19 16:57 ` Dmitry Torokhov
2012-09-19 18:34 ` Henrik Rydberg
2012-09-01 19:47 ` [PATCH v3 17/20] HID: Add an input configured notification callback Henrik Rydberg
2012-09-01 19:47 ` Henrik Rydberg
2012-09-01 19:47 ` [PATCH v3 19/20] HID: hid-multitouch: Remove the redundant touch state Henrik Rydberg
2012-09-01 19:47 ` [PATCH 20/20] HID: hid-multitouch: Add missing contact count detection Henrik Rydberg
2012-09-03 12:59 ` Benjamin Tissoires
2012-09-03 17:07 ` Henrik Rydberg
2012-09-05 15:09 ` [PATCH v2 20/20] HID: hid-multitouch: Fix contact count on 3M panels Henrik Rydberg
2012-09-03 13:00 ` [PATCH v3 v3 00/20] Input and HID updates for 3.7 Benjamin Tissoires
2012-09-03 17:08 ` Henrik Rydberg
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