From: Greg KH <greg@kroah.com>
To: Andy Shevchenko <andy.shevchenko@gmail.com>
Cc: linux-kernel@vger.kernel.org,
Andy Shevchenko <ext-andriy.shevchenko@nokia.com>,
Denis Karpov <ext-denis.2.karpov@nokia.com>,
Adrian Hunter <adrian.hunter@nokia.com>,
Alan Stern <stern@rowland.harvard.edu>,
David Brownell <dbrownell@users.sourceforge.net>,
Greg Kroah-Hartman <gregkh@suse.de>,
linux-usb@vger.kernel.org
Subject: Re: [PATCHv3 2/2] usb: gadget: storage: optional SCSI WRITE FUA bit
Date: Wed, 21 Jul 2010 12:17:11 -0700 [thread overview]
Message-ID: <20100721191711.GA28893@kroah.com> (raw)
In-Reply-To: <1279184841-15097-2-git-send-email-ext-andriy.shevchenko@nokia.com>
On Thu, Jul 15, 2010 at 12:07:21PM +0300, Andy Shevchenko wrote:
> MS Windows mounts removable storage in "Removal optimized mode" by
> default. All the writes to the media are synchronous which is achieved
> by setting FUA (Force Unit Access) bit in SCSI WRITE(10,12) commands.
> This prevents I/O requests aggregation in block layer dramatically
> decreasing performance.
>
> This patch brings an option to accept or ignore mentioned bit
> a) via specifying module parameter "nofua", or
> b) through sysfs entry
> /sys/devices/platform/musb_hdrc/gadget/gadget-lun-N/nofua
Any new sysfs entry needs a matching documentation entry in the
Documentation/ABI/ directory.
Care to resend these two patches, with that documentation change added
as well?
thanks,
greg k-h
next prev parent reply other threads:[~2010-07-21 19:19 UTC|newest]
Thread overview: 22+ messages / expand[flat|nested] mbox.gz Atom feed top
2010-07-13 8:36 [PATCH] usb: gadget: storage: optional SCSI WRITE FUA bit Andy Shevchenko
2010-07-13 14:09 ` Alan Stern
2010-07-14 9:05 ` [PATCHv2] " Andy Shevchenko
2010-07-14 12:38 ` Michał Nazarewicz
2010-07-14 13:44 ` Andy Shevchenko
2010-07-14 13:55 ` Roger Quadros
2010-07-16 7:54 ` Felipe Balbi
2010-07-16 8:38 ` Roger Quadros
2010-07-14 14:24 ` Michał Nazarewicz
2010-07-14 15:05 ` Andy Shevchenko
2010-07-14 17:12 ` Michał Nazarewicz
2010-07-15 9:07 ` [PATCHv3 1/2] usb: gadget: storage: strict coversion of 'ro' parameter Andy Shevchenko
2010-07-15 9:07 ` [PATCHv3 2/2] usb: gadget: storage: optional SCSI WRITE FUA bit Andy Shevchenko
2010-07-21 19:17 ` Greg KH [this message]
2010-07-22 8:58 ` [PATCHv4 1/2] usb: gadget: storage: strict coversion of 'ro' parameter Andy Shevchenko
2010-07-22 8:58 ` [PATCHv4 2/2] usb: gadget: storage: optional SCSI WRITE FUA bit Andy Shevchenko
2010-07-22 14:13 ` Alan Stern
2010-07-22 14:27 ` Andy Shevchenko
2010-07-22 14:53 ` [PATCHv5] " Andy Shevchenko
2010-07-22 14:07 ` [PATCHv4 1/2] usb: gadget: storage: strict coversion of 'ro' parameter Alan Stern
2010-07-22 14:17 ` Michał Nazarewicz
2010-07-21 19:17 ` [PATCHv3 " Greg KH
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