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7cf3b79ec8
linux/drivers/hv
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Vitaly Kuznetsov 7cf3b79ec8 Drivers: hv: balloon: keep track of where ha_region starts 
Windows 2012 (non-R2) does not specify hot add region in hot add requests
and the logic in hot_add_req() is trying to find a 128Mb-aligned region
covering the request. It may also happen that host's requests are not 128Mb
aligned and the created ha_region will start before the first specified
PFN. We can't online these non-present pages but we don't remember the real
start of the region.

This is a regression introduced by the commit 5abbbb75d7 ("Drivers: hv:
hv_balloon: don't lose memory when onlining order is not natural"). While
the idea of keeping the 'moving window' was wrong (as there is no guarantee
that hot add requests come ordered) we should still keep track of
covered_start_pfn. This is not a revert, the logic is different.

Signed-off-by: Vitaly Kuznetsov <vkuznets@redhat.com>
Signed-off-by: K. Y. Srinivasan <kys@microsoft.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2016-08-31 13:05:41 +02:00
..
channel_mgmt.c Drivers: hv: vmbus: Enable explicit signaling policy for NIC channels 2016-08-31 13:05:41 +02:00
channel.c Drivers: hv: vmbus: Implement a mechanism to tag the channel for low latency 2016-08-31 13:05:41 +02:00
connection.c Drivers: hv: vmbus: Reduce the delay between retries in vmbus_post_msg() 2016-08-31 13:05:41 +02:00
hv_balloon.c Drivers: hv: balloon: keep track of where ha_region starts 2016-08-31 13:05:41 +02:00
hv_fcopy.c Drivers: hv: utils: fix a race on userspace daemons registration 2016-08-31 13:05:41 +02:00
hv_kvp.c Drivers: hv: utils: fix a race on userspace daemons registration 2016-08-31 13:05:41 +02:00
hv_snapshot.c Drivers: hv: utils: fix a race on userspace daemons registration 2016-08-31 13:05:41 +02:00
hv_util.c Drivers: hv: util: Pass the channel information during the init call 2016-03-01 16:57:20 -08:00
hv_utils_transport.c Drivers: hv: utils: fix a race on userspace daemons registration 2016-08-31 13:05:41 +02:00
hv_utils_transport.h Drivers: hv: utils: fix a race on userspace daemons registration 2016-08-31 13:05:41 +02:00
hv.c Drivers: hv: avoid vfree() on crash 2016-08-31 13:05:40 +02:00
hyperv_vmbus.h Drivers: hv: vmbus: Enable explicit signaling policy for NIC channels 2016-08-31 13:05:41 +02:00
Kconfig x86: Make Linux guest support optional 2013-03-04 13:14:25 -08:00
Makefile Drivers: hv: util: introduce hv_utils_transport abstraction 2015-05-24 12:17:41 -07:00
ring_buffer.c Drivers: hv: vmbus: Enable explicit signaling policy for NIC channels 2016-08-31 13:05:41 +02:00
vmbus_drv.c Drivers: hv: avoid vfree() on crash 2016-08-31 13:05:40 +02:00