linux-kernel - Re: [PATCH 0/7] USB: serial: add wait_until

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>] [day] [month] [year] [list]

Date:	Mon, 20 May 2013 12:07:03 +0200
From:	Johan Hovold <jhovold@...il.com>
To:	Caylan Larson <i@...lan.net>
Cc:	Johan Hovold <jhovold@...il.com>,
	Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
	Peter Hurley <peter@...leysoftware.com>,
	Stas Sergeev <stsp@...t.ru>,
	Jarkko Huijts <jarkko.huijts@...il.com>,
	Alan Cox <alan@...ux.intel.com>, linux-usb@...r.kernel.org,
	linux-serial@...r.kernel.org, linux-kernel@...r.kernel.org,
	"Rafael J. Wysocki" <rjw@...k.pl>
Subject: Re: [PATCH 0/7] USB: serial: add wait_until_sent-support

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@...lan.net>
> 
> Caylan
> 
> 
> On May 5, 2013, at 1:32 PM, Johan Hovold <jhovold@...il.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.
--
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/