Ticket #7514: cache_io-re-lookup-after-satisfy_cache_io.diff

src/system/kernel/cache/file_cache.cpp

@@ -780 +780 @@
             if (status != B_OK)
                 return status;
 
-            if (page->busy) {
+            // Since satisfy_cache_io() unlocks the cache, we need to look up
+            // the page again.
+            page = cache->LookupPage(offset);
+            if (page != NULL && page->busy) {
                 cache->WaitForPageEvents(page, PAGE_EVENT_NOT_BUSY, true);
                 continue;
             }