> -----Original Message----- > From: K. Y. Srinivasan [mailto:kys@xxxxxxxxxxxxx] > Sent: Tuesday, January 27, 2015 3:47 PM > To: gregkh@xxxxxxxxxxxxxxxxxxx; linux-kernel@xxxxxxxxxxxxxxx; > devel@xxxxxxxxxxxxxxxxxxxxxx; olaf@xxxxxxxxx; apw@xxxxxxxxxxxxx; > vkuznets@xxxxxxxxxx; tglx@xxxxxxxxxxxxx > Cc: KY Srinivasan > Subject: [PATCH RESEND 1/8] Drivers: hv: vmbus: prevent cpu offlining on > newer hypervisors > > From: Vitaly Kuznetsov <vkuznets@xxxxxxxxxx> > > When an SMP Hyper-V guest is running on top of 2012R2 Server and > secondary cpus are sent offline (with echo 0 > > /sys/devices/system/cpu/cpu$cpu/online) > the system freeze is observed. This happens due to the fact that on newer > hypervisors (Win8, WS2012R2, ...) vmbus channel handlers are distributed > across all cpus (see init_vp_index() function in drivers/hv/channel_mgmt.c) > and on cpu offlining nobody reassigns them to CPU0. Prevent cpu offlining > when vmbus is loaded until the issue is fixed host-side. > > This patch also disables hibernation but it is OK as it is also broken (MCE error > is hit on resume). Suspend still works. > > Tested with WS2008R2 and WS2012R2. > > Signed-off-by: Vitaly Kuznetsov <vkuznets@xxxxxxxxxx> > Signed-off-by: K. Y. Srinivasan <kys@xxxxxxxxxxxxx> Greg, Please drop this entire series; the patch-set was based on the incorrect tree. I will resend the set shortly after rebasing them on your char-misc.git. Thank you, K. Y _______________________________________________ devel mailing list devel@xxxxxxxxxxxxxxxxxxxxxx http://driverdev.linuxdriverproject.org/mailman/listinfo/driverdev-devel
