From: Alan Cox <alan@lxorguk.ukuu.org.uk>
To: Sergei Organov <osv@javad.com>
Cc: Andrew Morton <akpm@osdl.org>,
gregkh@suse.de, linux-kernel@vger.kernel.org,
linux-usb-devel@lists.sourceforge.net
Subject: Re: [PATCH] Airprime driver improvements to allow full speed EvDO transfers
Date: Fri, 07 Jul 2006 21:07:11 +0100 [thread overview]
Message-ID: <1152302831.20883.63.camel@localhost.localdomain> (raw)
In-Reply-To: <87veq9cosq.fsf@javad.com>
Ar Gwe, 2006-07-07 am 21:23 +0400, ysgrifennodd Sergei Organov:
> It seems that there is much worse problem here. The amount of data that
> has been inserted by the tty_insert_flip_string() could be up to
> URB_TRANSFER_BUFFER_SIZE (=4096 bytes) and may easily exceed
> TTY_THRESHOLD_THROTTLE (=128 bytes) defined in the
> char/n_tty.c.
You may throttle late but that is always true as there is an implicit
race between the hardware signals and the chip FIFO on all UART devices.
The buffering should be taking care of it, and the tty layer taking care
not to over stuff the ldisc which I thought Paul had fixed while doing
the locking wizardry
Alan
next prev parent reply other threads:[~2006-07-07 19:50 UTC|newest]
Thread overview: 40+ messages / expand[flat|nested] mbox.gz Atom feed top
2006-06-30 5:48 [PATCH] Airprime driver improvements to allow full speed EvDO transfers Andy Gay
2006-06-30 7:10 ` Andrew Morton
2006-06-30 8:52 ` Pete Zaitcev
2006-06-30 16:59 ` Andy Gay
2006-06-30 10:51 ` Sergei Organov
2006-06-30 12:13 ` [linux-usb-devel] " Alan Cox
2006-06-30 12:02 ` Arjan van de Ven
2006-06-30 13:34 ` Alan Cox
2006-06-30 16:35 ` Andy Gay
2006-07-07 17:23 ` Sergei Organov
2006-07-07 20:07 ` Alan Cox [this message]
2006-07-10 10:36 ` Sergei Organov
2006-07-10 11:10 ` Alan Cox
2006-07-10 15:54 ` Sergei Organov
2006-07-10 17:31 ` Alan Cox
2006-07-10 17:24 ` Sergei Organov
2006-07-13 14:17 ` Sergei Organov
2006-07-13 15:40 ` Alan Cox
2006-07-13 18:20 ` Sergei Organov
2006-07-13 19:08 ` Greg KH
2006-07-14 10:13 ` Sergei Organov
2006-06-30 20:04 ` Roland Dreier
2006-06-30 20:13 ` Andy Gay
2006-07-02 18:48 ` Roland Dreier
2006-07-02 20:29 ` Andy Gay
2006-07-02 20:47 ` Roland Dreier
2006-07-03 7:00 ` Jeremy Fitzhardinge
2006-07-03 14:21 ` Andy Gay
2006-07-03 16:28 ` Jeremy Fitzhardinge
2006-07-03 17:00 ` Andy Gay
2006-07-03 17:00 ` Greg KH
2006-07-03 17:55 ` Andy Gay
2006-07-03 18:08 ` Jeremy Fitzhardinge
2006-07-03 18:16 ` Greg KH
2006-07-03 22:43 ` Andy Gay
2006-07-03 15:43 ` [linux-usb-devel] " Ken Brush
2006-07-03 16:19 ` Andy Gay
2006-07-11 18:31 ` Sergei Organov
2006-07-11 18:55 ` Andy Gay
2006-07-12 9:20 ` Sergei Organov
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