On Fri, Aug 21, 2015 at 01:24:17PM +0100, Ian Campbell wrote: > Hi kirkwood-upstream, > > We (Debian) have had a couple of reports of I/O errors running Debian > on kirkwood, specifically it seems to relate to later kernels (e.g. > 4.0+) and I _suspect_ (without proof) that it may be due to the switch > from board files to the DTS based kernel, or some change implied by > this (e.g. different SATA driver now or timeouts have changed > perhaps?).
Hi Ian I've not reproduced this exactly, but something similar. I do a find / and in parallel a cat /dev/mtdblock3 > /dev/null While the cat is active, the find grinds to a halt. I don't get any SATA timeouts, but that could be because /dev/mtdblock3 is small enough that the timers don't expire. So i will now try to track down if there is a lock getting contended, or at least why only the cat process makes progress. Andrew
