[libvirt] [PATCH v2 0/7] Memory locking limit improvements

During my testing, I've realized that even with the series applied there's still one case in which we're unable to restore the previous memory locking limit after removing the last PCI hostdev from the guest. If an x86 guest contains a PCI hostdev in its XML definition, then the memory locking limit will be set correctly, but virCommandGetMaxMemLock() will be used instead of virProcessGetMaxMemLock(), and the limit will be set right before calling exec() to spawn the qemu binary. In this context, we have no access to the virDomainObj or even virDomainDef instances, so I see no way of storing the original limit for later retrieval. The series is still an improvement as it covers all other cases. Still, I thought this was worth mentioning. Changes since v1[1]: * reorder commits according to John's suggestions * don't fail if we can't retrieve the current memory locking limit * small changes here and there as pointed out during review Cheers. [1] https://www.redhat.com/archives/libvir-list/2015-November/msg01021.html Andrea Bolognani (7): process: Allow virProcessPrLimit() to get current limit process: Add virProcessGetMaxMemLock() qemu: Add qemuDomainAdjustMaxMemLock() qemu: Use qemuDomainAdjustMaxMemLock() qemu: Reduce memlock limit after detaching PCI hostdev qemu: Allow qemuDomainAdjustMaxMemLock() to restore previous value qemu: Replace Mlock with MemLock in function names configure.ac | 2 +- src/conf/domain_conf.h | 3 +++ src/libvirt_private.syms | 1 + src/qemu/qemu_command.c | 4 ++-- src/qemu/qemu_domain.c | 53 ++++++++++++++++++++++++++++++++++++++--- src/qemu/qemu_domain.h | 5 ++-- src/qemu/qemu_hotplug.c | 45 ++++++++++++++--------------------- src/util/virprocess.c | 61 +++++++++++++++++++++++++++++++++++++++++++----- src/util/virprocess.h | 2 ++ 9 files changed, 135 insertions(+), 41 deletions(-) -- 2.5.0