> -----Original Message----- > From: Sitsofe Wheeler [mailto:sitsofe@xxxxxxxxx] > Sent: Friday, July 11, 2014 1:53 AM > To: Haiyang Zhang > Cc: KY Srinivasan; David S. Miller; devel@xxxxxxxxxxxxxxxxxxxxxx; linux- > kernel@xxxxxxxxxxxxxxx; netdev@xxxxxxxxxxxxxxx > Subject: Re: [BISECTED][REGRESSION] Loading Hyper-V network drivers is > racy in 3.14+ on Hyper-V 2012 R2 > Oops that should have been > https://bugzilla.kernel.org/attachment.cgi?id=142351 (either way it's > information linked off > https://bugzilla.kernel.org/show_bug.cgi?id=78771 ). Thanks for the dmesg. By looking at it, seems the netvsc driver was loaded properly, and 2 NICs are up, one NIC is down (probably not set to connected in HyperV manager?). Or, this dmesg wasn't the one when bug happens? [ 8.514493] hv_netvsc: hv_netvsc channel opened successfully [ 9.343318] hv_netvsc vmbus_0_14: Send section size: 6144, Section count:170 [ 9.345831] hv_netvsc vmbus_0_14: Device MAC 00:15:5d:6f:02:8f link state up [ 9.347101] hv_netvsc: hv_netvsc channel opened successfully [ 10.170308] hv_netvsc vmbus_0_15: Send section size: 6144, Section count:170 [ 10.170702] hv_netvsc vmbus_0_15: Device MAC 00:15:5d:6f:02:a5 link state up [ 10.172826] hv_netvsc: hv_netvsc channel opened successfully [ 10.988146] hv_netvsc vmbus_0_16: Send section size: 6144, Section count:170 [ 10.989069] hv_netvsc vmbus_0_16: Device MAC 00:15:5d:6f:02:a6 link state down Since you found the commit b679ef73edc is related to this problem, could you do a simple test: Reduce the receive buffer size back to 2MB, like below, then re-test it, see if the problem goes away? drivers/net/hyperv/hyperv_net.h #define NETVSC_RECEIVE_BUFFER_SIZE (1024*1024*2) /* 2MB */ Thanks, - Haiyang _______________________________________________ devel mailing list devel@xxxxxxxxxxxxxxxxxxxxxx http://driverdev.linuxdriverproject.org/mailman/listinfo/driverdev-devel
