diff options
| author | Paolo Bonzini <pbonzini@redhat.com> | 2013-05-17 12:37:03 +0200 |
|---|---|---|
| committer | Paolo Bonzini <pbonzini@redhat.com> | 2015-02-02 16:55:10 +0100 |
| commit | 374f2981d1f10bc4307f250f24b2a7ddb9b14be0 (patch) | |
| tree | b8a960af49a9c5c84ee4ce2efa1b64363cf1d529 /include | |
| parent | b476c99d01519277e3494a10dc0329d07157ae02 (diff) | |
memory: protect current_map by RCU
Replace the flat_view_mutex with RCU, avoiding futex contention for
dataplane on large systems and many iothreads.
Reviewed-by: Fam Zheng <famz@redhat.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Diffstat (limited to 'include')
| -rw-r--r-- | include/exec/memory.h | 5 |
1 files changed, 5 insertions, 0 deletions
diff --git a/include/exec/memory.h b/include/exec/memory.h index 0cd96b152e..06ffa1d185 100644 --- a/include/exec/memory.h +++ b/include/exec/memory.h @@ -33,6 +33,7 @@ #include "qemu/notify.h" #include "qapi/error.h" #include "qom/object.h" +#include "qemu/rcu.h" #define MAX_PHYS_ADDR_SPACE_BITS 62 #define MAX_PHYS_ADDR (((hwaddr)1 << MAX_PHYS_ADDR_SPACE_BITS) - 1) @@ -207,9 +208,13 @@ struct MemoryListener { */ struct AddressSpace { /* All fields are private. */ + struct rcu_head rcu; char *name; MemoryRegion *root; + + /* Accessed via RCU. */ struct FlatView *current_map; + int ioeventfd_nb; struct MemoryRegionIoeventfd *ioeventfds; struct AddressSpaceDispatch *dispatch; |