From mboxrd@z Thu Jan  1 00:00:00 1970
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Date: Tue, 07 Jan 2014 11:15:40 -0800
From: walt <w41ter@gmail.com>
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To: David Laight <David.Laight@ACULAB.COM>,
	Sarah Sharp <sarah.a.sharp@linux.intel.com>
CC: Alan Stern <stern@rowland.harvard.edu>,
	Greg Kroah-Hartman <gregkh@linuxfoundation.org>,
	Linux Kernel <linux-kernel@vger.kernel.org>,
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	"linux-usb@vger.kernel.org" <linux-usb@vger.kernel.org>,
	"linux-scsi@vger.kernel.org" <linux-scsi@vger.kernel.org>
Subject: Re: [PATCH 3.12 033/118] usb: xhci: Link TRB must not occur within
 a USB payload burst
References: <20131218211219.461663463@linuxfoundation.org> <20131218211220.412278148@linuxfoundation.org> <52C32BB0.90600@gmail.com> <20140102191510.GA9621@xanatos> <52C6D9F1.9000709@gmail.com> <20140103195455.GA4193@xanatos> <52C729CE.9050307@gmail.com> <20140103232929.GD4193@xanatos> <20140107003157.GA7963@xanatos> <52CC014C.5060604@gmail.com> <063D6719AE5E284EB5DD2968C1650D6D453E1A@AcuExch.aculab.com>
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On 01/07/2014 05:58 AM, David Laight wrote:
> The dmesg contains:
> 
> [  538.728064] EXT4-fs warning (device dm-0): ext4_end_bio:316: I/O error writing to inode 23330865 (offset 0 size 8388608 starting block 812628)
> 
> An 8MB transfer will need at least 128 ring entries (TRB) even if the request
> is a single contiguous memory block.
> 
> Are you using the patch that increases the ring size from 64 to 256?

Yes, 256.  I'll work on getting more debugging output.