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From: Johan Hovold <jhovold@gmail.com>
To: Caylan Larson <i@caylan.net>
Cc: Johan Hovold <jhovold@gmail.com>,
	Greg Kroah-Hartman <gregkh@linuxfoundation.org>,
	Peter Hurley <peter@hurleysoftware.com>,
	Stas Sergeev <stsp@list.ru>,
	Jarkko Huijts <jarkko.huijts@gmail.com>,
	Alan Cox <alan@linux.intel.com>,
	linux-usb@vger.kernel.org, linux-serial@vger.kernel.org,
	linux-kernel@vger.kernel.org, "Rafael J. Wysocki" <rjw@sisk.pl>
Subject: Re: [PATCH 0/7] USB: serial: add wait_until_sent-support
Date: Mon, 20 May 2013 12:07:03 +0200	[thread overview]
Message-ID: <20130520100703.GB21474@localhost> (raw)
In-Reply-To: <81D166EE-BB85-4A72-A6FA-A1F6B5633CB0@caylan.net>

On Fri, May 17, 2013 at 10:46:37AM -0500, Caylan Larson wrote:
> Johan,
> 
> I have tested these patches and the performance is much better.  Thank you.

Thanks for testing. The patches are already in the usb tree (usb-linus
branch) and should show up in v3.10-rc soon.

Johan

> Tested-by: Caylan Larson <i@caylan.net>
> 
> Caylan
> 
> 
> On May 5, 2013, at 1:32 PM, Johan Hovold <jhovold@gmail.com> wrote:
> 
> > These patches add wait_until_sent-support to usb-serial, which removes
> > the need to check hardware buffers in chars_in_buffer.
> > 
> > This fixes a problem in ftdi_sio (since 3.7) where select or TIOCMOUTQ
> > would take much longer than before due the hardware buffers being
> > queried.
> > 
> > Hardware buffers are also currently checked in chars_in_buffer in io_ti
> > (since 3.8) and ti_usb_3410_5052 (in 3.10).
> > 
> > Note that simply removing the hardware-buffer checks (e.g. for the
> > stable trees) would break tty_wait_until_sent, which is used, for
> > instance, by tcdrain, tcsendbreak, and close.

  parent reply	other threads:[~2013-05-20 10:07 UTC|newest]

Thread overview: 36+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2013-05-03 15:02 Regression: ftdi_sio is slow (since Wed Oct 10 15:05:06 2012) Stas Sergeev
2013-05-03 16:30 ` Greg KH
2013-05-03 17:38   ` Stas Sergeev
2013-05-03 16:52     ` Greg KH
2013-05-03 18:05       ` Stas Sergeev
2013-05-03 17:16         ` Greg KH
2013-05-03 18:27           ` Stas Sergeev
2013-05-03 18:27             ` Stas Sergeev
2013-05-03 20:34             ` Greg KH
2013-05-03 20:34               ` Greg KH
     [not found]               ` <20130503203419.GA25932-U8xfFu+wG4EAvxtiuMwx3w@public.gmane.org>
2013-05-03 21:50                 ` Stas Sergeev
2013-05-03 21:50                   ` Stas Sergeev
2013-05-04 11:15                   ` Johan Hovold
2013-05-04 11:15                     ` Johan Hovold
2013-05-04 11:39                     ` Peter Hurley
2013-05-05 18:29                       ` Johan Hovold
2013-05-05 18:32                         ` [PATCH 0/7] USB: serial: add wait_until_sent-support Johan Hovold
2013-05-05 18:32                           ` [PATCH 1/7] USB: serial: add wait_until_sent operation Johan Hovold
     [not found]                           ` <1367778753-22297-1-git-send-email-jhovold-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org>
2013-05-05 18:32                             ` [PATCH 2/7] USB: serial: add generic wait_until_sent implementation Johan Hovold
2013-05-05 18:32                               ` Johan Hovold
2013-05-08 14:25                               ` Stas Sergeev
2013-05-08 14:25                                 ` Stas Sergeev
2013-05-08 15:48                                 ` Johan Hovold
2013-05-08 15:48                                   ` Johan Hovold
2013-05-08 15:51                               ` [PATCH v2 2/8] " Johan Hovold
2013-05-05 18:32                           ` [PATCH 3/7] USB: ftdi_sio: clean up get_modem_status Johan Hovold
2013-05-05 18:32                           ` [PATCH 4/7] USB: ftdi_sio: fix chars_in_buffer overhead Johan Hovold
2013-05-05 18:32                           ` [PATCH 5/7] USB: io_ti: " Johan Hovold
2013-05-05 18:32                           ` [PATCH 6/7] USB: ti_usb_3410_5052: " Johan Hovold
2013-05-05 18:32                           ` [PATCH 7/7] USB: serial: clean up chars_in_buffer Johan Hovold
     [not found]                           ` <81D166EE-BB85-4A72-A6FA-A1F6B5633CB0@caylan.net>
2013-05-20 10:07                             ` Johan Hovold [this message]
2013-05-04 12:44                     ` Regression: ftdi_sio is slow (since Wed Oct 10 15:05:06 2012) Stas Sergeev
2013-05-04 12:44                       ` Stas Sergeev
2013-05-04  9:37                 ` Stas Sergeev
2013-05-04  9:37                   ` Stas Sergeev
2013-05-03 18:15       ` Stas Sergeev

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