linux-toradex.git/Documentation/virtual/kvm/locking.txt, branch v3.14.4

KVM: doc: Fix typo in doc/virtual/kvm

2013-12-31T19:24:54+00:00

Correct spelling typo in Documentations/virtual/kvm

Signed-off-by: Masanari Iida 
Acked-by: Randy Dunlap 
Signed-off-by: Marcelo Tosatti

KVM: Convert kvm_lock back to non-raw spinlock

2013-09-30T07:21:51+00:00

In commit e935b8372cf8 ("KVM: Convert kvm_lock to raw_spinlock"),
the kvm_lock was made a raw lock.  However, the kvm mmu_shrink()
function tries to grab the (non-raw) mmu_lock within the scope of
the raw locked kvm_lock being held.  This leads to the following:

BUG: sleeping function called from invalid context at kernel/rtmutex.c:659
in_atomic(): 1, irqs_disabled(): 0, pid: 55, name: kswapd0
Preemption disabled at:[] mmu_shrink+0x5c/0x1b0 [kvm]

Pid: 55, comm: kswapd0 Not tainted 3.4.34_preempt-rt
Call Trace:
 [] __might_sleep+0xfd/0x160
 [] rt_spin_lock+0x24/0x50
 [] mmu_shrink+0xec/0x1b0 [kvm]
 [] shrink_slab+0x17d/0x3a0
 [] ? mem_cgroup_iter+0x130/0x260
 [] balance_pgdat+0x54a/0x730
 [] ? set_pgdat_percpu_threshold+0xa7/0xd0
 [] kswapd+0x18f/0x490
 [] ? get_parent_ip+0x11/0x50
 [] ? __init_waitqueue_head+0x50/0x50
 [] ? balance_pgdat+0x730/0x730
 [] kthread+0xdb/0xe0
 [] ? finish_task_switch+0x52/0x100
 [] kernel_thread_helper+0x4/0x10
 [] ? __init_kthread_worker+0x

After the previous patch, kvm_lock need not be a raw spinlock anymore,
so change it back.

Reported-by: Paul Gortmaker 
Cc: kvm@vger.kernel.org
Cc: gleb@redhat.com
Cc: jan.kiszka@siemens.com
Reviewed-by: Gleb Natapov 
Signed-off-by: Paolo Bonzini

KVM: protect kvm_usage_count with its own spinlock

2013-09-30T07:21:46+00:00

The VM list need not be protected by a raw spinlock.  Separate the
two so that kvm_lock can be made non-raw.

Cc: kvm@vger.kernel.org
Cc: gleb@redhat.com
Cc: jan.kiszka@siemens.com
Reviewed-by: Gleb Natapov 
Signed-off-by: Paolo Bonzini

KVM: Add documentation for kvm->srcu lock

2013-09-24T17:12:12+00:00

This patch documents the kvm->srcu lock (using the information from
a mail which has been posted by Marcelo Tosatti to the kvm mailing
list some months ago, see the following URL for details:
http://www.mail-archive.com/kvm@vger.kernel.org/msg90040.html )

Signed-off-by: Thomas Huth 
Reviewed-by: Xiao Guangrong 
Signed-off-by: Paolo Bonzini

KVM: MMU: document mmu-lock and fast page fault

2012-07-11T13:51:23+00:00

Document fast page fault and mmu-lock in locking.txt

Signed-off-by: Xiao Guangrong 
Signed-off-by: Avi Kivity

Move kvm, uml, and lguest subdirectories under a common "virtual" directory, I.E:

2011-05-06T16:22:02+00:00

  cd Documentation
  mkdir virtual
  git mv kvm uml lguest virtual

Signed-off-by: Rob Landley 
Signed-off-by: Randy Dunlap