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memory: avoid unnecessary coalesced_io_del operations
Store whether the FlatRange has had any coalesced I/O ranges applied, and if not avoid calling coalesced_io_del. This is useful in preparation for the next patch, which will call coalesced_io_del when rendering memory regions. Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
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parent
909bf76302
commit
1f7af80429
11
memory.c
11
memory.c
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@ -217,6 +217,7 @@ struct FlatRange {
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bool romd_mode;
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bool readonly;
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bool nonvolatile;
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bool has_coalesced_range;
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};
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#define FOR_EACH_FLAT_RANGE(var, view) \
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@ -650,6 +651,7 @@ static void render_memory_region(FlatView *view,
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fr.romd_mode = mr->romd_mode;
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fr.readonly = readonly;
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fr.nonvolatile = nonvolatile;
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fr.has_coalesced_range = false;
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/* Render the region itself into any gaps left by the current view. */
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for (i = 0; i < view->nr && int128_nz(remain); ++i) {
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@ -852,6 +854,10 @@ static void address_space_update_ioeventfds(AddressSpace *as)
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static void flat_range_coalesced_io_del(FlatRange *fr, AddressSpace *as)
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{
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if (!fr->has_coalesced_range) {
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return;
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}
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MEMORY_LISTENER_UPDATE_REGION(fr, as, Reverse, coalesced_io_del,
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int128_get64(fr->addr.start),
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int128_get64(fr->addr.size));
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@ -863,6 +869,11 @@ static void flat_range_coalesced_io_add(FlatRange *fr, AddressSpace *as)
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CoalescedMemoryRange *cmr;
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AddrRange tmp;
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if (QTAILQ_EMPTY(&mr->coalesced)) {
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return;
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}
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fr->has_coalesced_range = true;
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QTAILQ_FOREACH(cmr, &mr->coalesced, link) {
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tmp = addrrange_shift(cmr->addr,
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int128_sub(fr->addr.start,
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