Re: 4.3-rc3 Regression: NFS access stall by commit 6ae459bdaaee

On Mon, Sep 28, 2015 at 6:12 AM, Takashi Iwai [off-list ref] wrote:

[I resent this since the previous mail didn't go out properly, as it
 seems; apologies if you already read it, please disregard]

Hi,

I noticed that NFS access from my workstation slowed down drastically,
almost stalls, with the fresh 4.3-rc3.  There are no particular kernel
errors / warnings.

I have seen error reports related to IPv6 traffic which I am
debugging. Are you trying access NFS over IPv6?

Then I performed git section, and it leaded to the commit:
6ae459bdaaeebc632b16e54dcbabb490c6931d61
    skbuff: Fix skb checksum flag on skb pull

Reverting this commit from 4.3-rc3 fixed the issue indeed.

Could you take a look at this?  I added Trond to Cc in case he might
already know of it.


thanks,

Takashi