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-rw-r--r--src/video_core/buffer_cache/buffer_cache.h13
1 files changed, 11 insertions, 2 deletions
diff --git a/src/video_core/buffer_cache/buffer_cache.h b/src/video_core/buffer_cache/buffer_cache.h
index 481b2f0f32..f6d394ce81 100644
--- a/src/video_core/buffer_cache/buffer_cache.h
+++ b/src/video_core/buffer_cache/buffer_cache.h
@@ -234,8 +234,17 @@ std::optional<VideoCore::RasterizerDownloadArea> BufferCache<P>::GetFlushArea(DA
};
area->preemtive = !IsRegionGpuModified(device_addr_start_aligned,
device_addr_end_aligned - device_addr_start_aligned);
- memory_tracker.MarkRegionAsPreflushable(device_addr_start_aligned,
- device_addr_end_aligned - device_addr_start_aligned);
+ // Mark only data that the GPU wrote. A mark stays for the session and sends later GPU writes
+ // in the range to a download at each fence.
+ if (!area->preemtive) {
+ memory_tracker.MarkRegionAsPreflushable(device_addr_start_aligned,
+ device_addr_end_aligned - device_addr_start_aligned);
+ } else {
+ // The core keeps this area and has no mark. The next GPU write here must arm the range
+ // again, which ends the area and sets the trap.
+ read_trapped_ranges.Subtract(device_addr_start_aligned,
+ device_addr_end_aligned - device_addr_start_aligned);
+ }
return area;
}