Re: NFS corruption, fixed by echo 1 > /proc/sys/vm/drop_caches -- next debugging steps?

On Sat, 2017-12-09 at 13:03 -0800, Matt Turner wrote:

On Fri, Dec 8, 2017 at 1:16 PM, Eric Dumazet [off-list ref]
wrote:

quoted

On Fri, 2017-12-08 at 12:26 -0800, Matt Turner wrote:

quoted

Thanks for the quick reply!

I tried the patch on top of master, but unfortunately the
corruption
still occurs.

You might try replacing in sbdma_add_rcvbuffer()

sb_new = netdev_alloc_skb(dev, size);

by

sb_new = alloc_skb(size, GFP_ATOMIC);

Maybe the device does not like having a frame spanning 2 pages.

No such luck. I also gave changing the page size from 16K to 4K a
shot
without success.

If your hist is SMP, could you try running it with one CPU only ?

Sorry, I have no more ideas :/