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Kernel: Memory purging was incorrectly "purging" the shared zero page
This caused us to report one purged page per occurrence of the shared zero page in a purgeable memory region, despite it being a no-op. Thanks to Sergey for spotting the bad assertion removal that led to this being found!
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2 changed files with 2 additions and 1 deletions
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@ -74,7 +74,7 @@ int PurgeableVMObject::purge_impl()
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return 0;
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int purged_page_count = 0;
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for (size_t i = 0; i < m_physical_pages.size(); ++i) {
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if (m_physical_pages[i])
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if (m_physical_pages[i] && !m_physical_pages[i]->is_shared_zero_page())
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++purged_page_count;
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m_physical_pages[i] = MM.shared_zero_page();
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}
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