Re: [tcpdump-workers] Request for link layer header type

2017-05-02 Thread Erik de Jong
On Tue, Apr 11, 2017 at 9:23 PM, Erik de Jong wrote: > On Tue, Apr 11, 2017 at 3:55 PM, Michael Richardson > wrote: > >> Erik de Jong wrote: >> > I was engaged in other activities lately, but would like to pick >> this >> > up again. Anything that I will have to address before a DLT can

Re: [tcpdump-workers] TPACKET_V3 timeout bug?

2017-05-02 Thread Guy Harris
On May 2, 2017, at 8:04 AM, chetan loke wrote: > On Sat, Apr 15, 2017 at 7:41 PM, Guy Harris wrote: >> On Apr 15, 2017, at 7:10 PM, Andrew Lunn wrote: >> >>> Do you think this is a kernel problem, libpcap problem, or an >>> application problem? >> > > Its clearly a kernel regression. > > If

Re: [tcpdump-workers] TPACKET_V3 timeout bug?

2017-05-02 Thread Guy Harris
On May 2, 2017, at 10:54 AM, Guy Harris wrote: > Yes, there's a case where user space wasn't being woken up. See also this thread from almost 3 years ago, beginning with http://marc.info/?l=linux-netdev&m=140633612828824&w=2 and this patch thread from almost 2 1/2 years ago: h

Re: [tcpdump-workers] TPACKET_V3 timeout bug?

2017-05-02 Thread Guy Harris
On May 2, 2017, at 10:16 AM, chetan loke wrote: > Commit that caused it: > > https://github.com/torvalds/linux/commit/41a50d621a321b4c15273cc1b5ed41437f4acdfb > > Reverting that change is what we need. As long as you do *not* revert https://github.com/torvalds/linux/commit/da413eec72