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authorJuan Quintela <quintela@redhat.com>2012-07-20 12:33:00 +0200
committerJuan Quintela <quintela@redhat.com>2012-10-17 18:34:58 +0200
commitc6bf8e0e0cf04b40a8a22426e00ebbd727331d8b (patch)
treed87faa8ac75a2aabd59fb2e685a90bf1d46b8a07 /memory_mapping.h
parent3c12193d998249bcbe5099edf85039bcd25c3a80 (diff)
Separate migration bitmap
This patch creates a migration bitmap, which is periodically kept in sync with the qemu bitmap. A separate copy of the dirty bitmap for the migration limits the amount of concurrent access to the qemu bitmap from iothread and migration thread (which requires taking the big lock). We use the qemu bitmap type. We have to "undo" the dirty_pages counting optimization on the general dirty bitmap and do the counting optimization with the migration local bitmap. Signed-off-by: Umesh Deshpande <udeshpan@redhat.com> Signed-off-by: Paolo Bonzini <pbonzini@redhat.com> Signed-off-by: Juan Quintela <quintela@redhat.com>
Diffstat (limited to 'memory_mapping.h')
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