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rsx/zcull: Improve deadlock avoidance
- Do not acquire eng lock while holding the page lock RSXThread may be waiting on the page lock and will never ack the pause request
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@ -882,7 +882,14 @@ namespace rsx
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eng_lock(rsx::thread* target)
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:pthr(target)
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{
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if (pthr) pthr->pause();
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if (pthr->is_current_thread())
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{
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pthr = nullptr;
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}
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else
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{
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pthr->pause();
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}
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}
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~eng_lock()
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@ -838,10 +838,7 @@ namespace rsx
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// Flush all pending writes
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m_critical_reports_in_flight += 0x100000;
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{
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rsx::eng_lock rlock(ptimer->is_current_thread() ? nullptr : ptimer);
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ptimer->sync();
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}
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ptimer->sync();
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m_critical_reports_in_flight -= 0x100000;
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// Unlock pages
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@ -877,6 +874,7 @@ namespace rsx
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return false;
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}
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bool need_disable_optimizations = false;
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{
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reader_lock lock(m_pages_mutex);
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@ -891,20 +889,31 @@ namespace rsx
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if (fault_page.has_refs())
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{
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// R/W to active block
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disable_optimizations(rsx::get_current_renderer(), location);
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need_disable_optimizations = true; // Defer actual operation
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m_pages_accessed[location] = true;
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}
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else
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{
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// R/W to stale block, unload it and move on
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utils::memory_protect(vm::base(page_address), 4096, utils::protection::rw);
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m_locked_pages[location].erase(page_address);
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}
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return true;
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return true;
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}
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}
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}
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}
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// Deadlock avoidance, do not pause RSX FIFO eng while holding the pages lock
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if (need_disable_optimizations)
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{
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auto thr = rsx::get_current_renderer();
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rsx::eng_lock rlock(thr);
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std::scoped_lock lock(m_pages_mutex);
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disable_optimizations(thr, location);
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return true;
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}
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return false;
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}
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