diff options
Diffstat (limited to 'Kernel/VM/MemoryManager.cpp')
| -rw-r--r-- | Kernel/VM/MemoryManager.cpp | 23 |
1 files changed, 20 insertions, 3 deletions
diff --git a/Kernel/VM/MemoryManager.cpp b/Kernel/VM/MemoryManager.cpp index db2a55e0f7..8f44ddc25a 100644 --- a/Kernel/VM/MemoryManager.cpp +++ b/Kernel/VM/MemoryManager.cpp @@ -9,6 +9,7 @@ #include <Kernel/VM/AnonymousVMObject.h> #include <Kernel/VM/InodeVMObject.h> #include <Kernel/VM/MemoryManager.h> +#include <Kernel/VM/PurgeableVMObject.h> //#define MM_DEBUG //#define PAGE_FAULT_DEBUG @@ -424,9 +425,25 @@ RefPtr<PhysicalPage> MemoryManager::allocate_user_physical_page(ShouldZeroFill s kprintf("MM: no user physical regions available (?)\n"); } - kprintf("MM: no user physical pages available\n"); - ASSERT_NOT_REACHED(); - return {}; + for_each_vmobject([&](auto& vmobject) { + if (vmobject.is_purgeable()) { + auto& purgeable_vmobject = static_cast<PurgeableVMObject&>(vmobject); + int purged_page_count = purgeable_vmobject.purge_with_interrupts_disabled({}); + if (purged_page_count) { + kprintf("MM: Purge saved the day! Purged %d pages from PurgeableVMObject{%p}\n", purged_page_count, &purgeable_vmobject); + page = find_free_user_physical_page(); + ASSERT(page); + return IterationDecision::Break; + } + } + return IterationDecision::Continue; + }); + + if (!page) { + kprintf("MM: no user physical pages available\n"); + ASSERT_NOT_REACHED(); + return {}; + } } #ifdef MM_DEBUG |