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[Qemu-devel] [PATCH 0/3] run RCU callbacks within the iothread mutex, fi
[Qemu-devel] [PATCH 0/3] run RCU callbacks within the iothread mutex, fix PCI hotplug
Wed, 11 Feb 2015 18:14:29 +0100
Patch 1 avoids that RCU callbacks are delayed forever if there's
scarcity of them, which is bad because qemu_opts_del will be called in
a RCU callbacks.
Patches 2 avoids complications due to instance_finalize callbacks that
are not thread-safe. It's a big hammer and it is not handsome, but I
gave up on making VFIO list manipulations thread-safe.
Patch 3 avoids a use-after-free when freeing address spaces.
These patches survived several hundred hotplug cycles, with MALLOC_PERTURB_
and G_SLICE=always-malloc on.
Paolo Bonzini (3):
rcu: do not let RCU callbacks pile up indefinitely
rcu: run RCU callbacks under the BQL
memory: keep the owner of the AddressSpace alive until
memory.c | 5 +++++
tests/Makefile | 2 +-
util/rcu.c | 19 +++++++++++++------
3 files changed, 19 insertions(+), 7 deletions(-)
- [Qemu-devel] [PATCH 0/3] run RCU callbacks within the iothread mutex, fix PCI hotplug,
Paolo Bonzini <=