On 14-01-02 02:15 PM, Sarah Sharp wrote: > On Tue, Dec 31, 2013 at 12:40:16PM -0800, walt wrote: .. >> Unfortunately this patch causes a regression when copying large files to my >> outboard USB3 drive. (Nothing at all to do with networking.) >> >> When I try to copy a large (20GB) file to the USB3 drive, the copy dies after >> about 7GB, the ext4 journal aborts and the drive is remounted read-only. >> >> This bug is 100% reproducible (always pretty close to 7GB) and reverting this >> patch completely fixes the problem. > > Ok, I had feared that would be a consequence of this patch. I think the > problem is that the usb-storage driver submitted an URB with more > scatter-gather entries than would fit on the ring segment, the xHCI > driver rejected the URB with -ENOMEM, and the SCSI core eventually gave > up on the SCSI command.
Is there not a block layer / scheduler tunable for max sg entries or something? -- Mark Lord Real-Time Remedies Inc. ml...@pobox.com -- To unsubscribe from this list: send the line "unsubscribe linux-usb" in the body of a message to majord...@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html
