Re: LTP rwtest01 blocks on DAX mountpoint

On Fri 30-12-16 17:33:53, Xiong Zhou wrote:

On Sat, Dec 24, 2016 at 07:07:14PM +0800, Xiong Zhou wrote:

quoted

Hi lists,

Since around 20161129 tag, LTP rwtest01 on dax mountpoint blocks
on linux-next tree, now on Linus tree.

In "normal", rwtest01 subcase ends in a few minutes, now it keeps
running for hours on dax mountpoint, both ext4 and xfs. Ctrl + c
can interrupt it.

Test programme is waiting for a memcpy call to return.

From sysrq output, kernel code is not blocking on somewhere,
it just wont return.

I was trying to reproduce this but for me rwtest01 completes just fine on
dax mountpoint (I've used your reproducer). So can you sample several
kernel stack traces to get a rough idea where the kernel is running?
Thanks!

								Honza
-- 
Jan Kara [off-list ref]
SUSE Labs, CR