linux-toradex.git/Documentation, branch v3.2.2-rt10

Merge commit 'v3.2.1' into rt-3.2.1-rt10

2012-01-16T19:03:35+00:00

ping-sysrq.patch

2012-01-16T19:00:35+00:00

There are (probably rare) situations when a system crashed and the system
console becomes unresponsive but the network icmp layer still is alive.
Wouldn't it be wonderful, if we then could submit a sysreq command via ping?

This patch provides this facility. Please consult the updated documentation
Documentation/sysrq.txt for details.

Signed-off-by: Carsten Emde

hwlatdetect.patch

2012-01-16T19:00:12+00:00

Jon Masters developed this wonderful SMI detector. For details please
consult Documentation/hwlat_detector.txt. It could be ported to Linux
3.0 RT without any major change.

Signed-off-by: Carsten Emde

latency-hist.patch

2012-01-16T19:00:12+00:00

This patch provides a recording mechanism to store data of potential
sources of system latencies. The recordings separately determine the
latency caused by a delayed timer expiration, by a delayed wakeup of the
related user space program and by the sum of both. The histograms can be
enabled and reset individually. The data are accessible via the debug
filesystem. For details please consult Documentation/trace/histograms.txt.

Signed-off-by: Carsten Emde 
Signed-off-by: Thomas Gleixner

USB: update documentation for usbmon

2012-01-12T19:29:34+00:00

commit d8cae98cddd286e38db1724dda1b0e7b467f9237 upstream.

The documentation for usbmon is out of date; the usbfs "devices" file
now exists in /sys/kernel/debug/usb rather than /proc/bus/usb.  This
patch (as1505) updates the documentation accordingly, and also
mentions that the necessary information can be found by running lsusb.

Signed-off-by: Alan Stern 
CC: Pete Zaitcev 
Signed-off-by: Greg Kroah-Hartman

Documentation: Update stable address

2012-01-12T19:29:17+00:00

commit 2eb7f204db51969ea558802a6601d79c2fb273b9 upstream.

The Japanese/Korean/Chinese versions still need updating.

Also, the stable kernel 2.6.x.y descriptions are out of date
and should be updated as well.

Signed-off-by: Joe Perches 
Signed-off-by: Greg Kroah-Hartman

KVM: Don't automatically expose the TSC deadline timer in cpuid

2011-12-26T11:27:44+00:00

Unlike all of the other cpuid bits, the TSC deadline timer bit is set
unconditionally, regardless of what userspace wants.

This is broken in several ways:
 - if userspace doesn't use KVM_CREATE_IRQCHIP, and doesn't emulate the TSC
   deadline timer feature, a guest that uses the feature will break
 - live migration to older host kernels that don't support the TSC deadline
   timer will cause the feature to be pulled from under the guest's feet;
   breaking it
 - guests that are broken wrt the feature will fail.

Fix by not enabling the feature automatically; instead report it to userspace.
Because the feature depends on KVM_CREATE_IRQCHIP, which we cannot guarantee
will be called, we expose it via a KVM_CAP_TSC_DEADLINE_TIMER and not
KVM_GET_SUPPORTED_CPUID.

Fixes the Illumos guest kernel, which uses the TSC deadline timer feature.

[avi: add the KVM_CAP + documentation]

Reported-by: Alexey Zaytsev 
Tested-by: Alexey Zaytsev 
Signed-off-by: Jan Kiszka 
Signed-off-by: Avi Kivity

KVM: Device assignment permission checks

2011-12-25T17:03:54+00:00

Only allow KVM device assignment to attach to devices which:

 - Are not bridges
 - Have BAR resources (assume others are special devices)
 - The user has permissions to use

Assigning a bridge is a configuration error, it's not supported, and
typically doesn't result in the behavior the user is expecting anyway.
Devices without BAR resources are typically chipset components that
also don't have host drivers.  We don't want users to hold such devices
captive or cause system problems by fencing them off into an iommu
domain.  We determine "permission to use" by testing whether the user
has access to the PCI sysfs resource files.  By default a normal user
will not have access to these files, so it provides a good indication
that an administration agent has granted the user access to the device.

[Yang Bai: add missing #include]
[avi: fix comment style]

Signed-off-by: Alex Williamson 
Signed-off-by: Yang Bai 
Signed-off-by: Marcelo Tosatti

KVM: Remove ability to assign a device without iommu support

2011-12-25T15:13:31+00:00

This option has no users and it exposes a security hole that we
can allow devices to be assigned without iommu protection.  Make
KVM_DEV_ASSIGN_ENABLE_IOMMU a mandatory option.

Signed-off-by: Alex Williamson 
Signed-off-by: Marcelo Tosatti

Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/sage/ceph-client

2011-12-13T22:59:42+00:00

* 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/sage/ceph-client:
  ceph: add missing spin_unlock at ceph_mdsc_build_path()
  ceph: fix SEEK_CUR, SEEK_SET regression
  crush: fix mapping calculation when force argument doesn't exist
  ceph: use i_ceph_lock instead of i_lock
  rbd: remove buggy rollback functionality
  rbd: return an error when an invalid header is read
  ceph: fix rasize reporting by ceph_show_options