On Fri, Jun 13, 2014 at 8:59 AM, Johannes Berg <johannes@xxxxxxxxxxxxxxxx> wrote: > On Fri, 2014-06-13 at 06:48 +0000, Linus Torvalds wrote: >> On Thu, Jun 12, 2014 at 12:14 PM, David Miller <davem@xxxxxxxxxxxxx> wrote: >> > >> > git://git.kernel.org/pub/scm/linux/kernel/git/davem/net-next.git master >> >> Hmm. I get *lots* of the appended messages from iwlwifi now. Things >> still seem to work, but ... >> >> This is a Haswell laptop with bog-standard intel wireless: >> >> 01:00.0 Network controller: Intel Corporation Wireless 7260 (rev 6b) >> >> Any ideas? > > Looks odd. > > If the stacktrace/message > >> [ 273.783438] <unknown>: hw csum failure >> [ 273.783449] CPU: 2 PID: 2199 Comm: Chrome_IOThread Not tainted 3.15.0-11906-g6d87c225f5d8 #8 >> [ 273.783451] Hardware name: Sony Corporation SVP11213CXB/VAIO, BIOS R0270V7 05/17/2013 >> [ 273.783461] Call Trace: >> [ 273.783477] [<ffffffff8159d199>] ? dump_stack+0x41/0x51 >> [ 273.783488] [<ffffffff814a4f1d>] ? skb_copy_and_csum_datagram_iovec+0xfd/0x110 >> [ 273.783494] [<ffffffff8150e2ea>] ? udp_recvmsg+0x1ca/0x390 >> [ 273.783500] [<ffffffff81518e95>] ? inet_recvmsg+0x65/0x80 >> [ 273.783506] [<ffffffff814971f5>] ? sock_recvmsg+0x95/0xd0 >> [ 273.783511] [<ffffffff81197862>] ? ep_send_events_proc+0xa2/0x1b0 >> [ 273.783513] [<ffffffff811977c0>] ? ep_read_events_proc+0xb0/0xb0 >> [ 273.783516] [<ffffffff81497325>] ? SYSC_recvfrom+0xb5/0x110 >> [ 273.783521] [<ffffffff8108bdc0>] ? wake_up_state+0x10/0x10 >> [ 273.783527] [<ffffffff815a3d92>] ? system_call_fastpath+0x16/0x1b > > is to be believed, then I'm not sure why you think iwlwifi is involved > though. > > Either way, iwlwifi doesn't support HW checksumming, so it failing makes > no sense, it's not there to start with. > > The only thing that touched this seems to be Tom's patch: > > commit 7e3cead5172927732f51fde77fef6f521e22f209 > Author: Tom Herbert <therbert@xxxxxxxxxx> > Date: Tue Jun 10 18:54:19 2014 -0700 > > net: Save software checksum complete > > but I'm not familiar enough to say where this leads. > > If it's iwlwifi, then maybe that commit broke something with devices > that don't support checksumming? Tom posted some fixes for this: http://marc.info/?l=linux-netdev&m=140261417832399&w=2 I can confirm the first one fixes the issue I was having (10s delay in ssh login), cfr. http://marc.info/?l=linux-netdev&m=140257250715322&w=2 However, the second patch reintroduces the bad behavior again? Gr{oetje,eeting}s, Geert -- Geert Uytterhoeven -- There's lots of Linux beyond ia32 -- geert@xxxxxxxxxxxxxx In personal conversations with technical people, I call myself a hacker. But when I'm talking to journalists I just say "programmer" or something like that. -- Linus Torvalds -- To unsubscribe from this list: send the line "unsubscribe linux-wireless" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
