I'm hitting a WARN_ON running XDP with virtio net:
[ 177.185570] ------------[ cut here ]------------
[ 177.187250] WARNING: CPU: 0 PID: 880 at
/home/dsa/kernel.git/drivers/pci/msi.c:1251 pci_irq_vector+0x92/0x123
[ 177.190932] Modules linked in: 8021q garp mrp stp llc vrf
[ 177.193473] CPU: 0 PID: 880 Comm: xdp1 Not tainted 4.11.0-rc5+ #305
[ 177.195640] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996),
BIOS 1.7.5-20140531_083030-gandalf 04/01/2014
[ 177.199190] Call Trace:
[ 177.200072] dump_stack+0x81/0xb6
[ 177.201018] __warn+0x107/0x122
[ 177.201899] warn_slowpath_null+0x1d/0x1f
[ 177.203014] pci_irq_vector+0x92/0x123
[ 177.204082] vp_synchronize_vectors+0x6f/0x81
[ 177.205293] vp_reset+0x50/0x55
[ 177.206174] virtnet_xdp+0x346/0x6dd
[ 177.207188] dev_change_xdp_fd+0x12a/0x151
[ 177.208256] do_setlink+0x1288/0x130a
Seems to be something introduced in the past month or so. 2 attempts to
bisect it pointed to this commit:
commit 54d7989f476ca57fc3c5cc71524c480ccb74c481
Merge: 0f221a3102bb c4baad50297d
Author: Linus Torvalds <torva...@linux-foundation.org>
Date: Thu Mar 2 13:53:13 2017 -0800
Merge tag 'for_linus' of
git://git.kernel.org/pub/scm/linux/kernel/git/mst/vhost
Pull vhost updates from Michael Tsirkin:
"virtio, vhost: optimizations, fixes
