alloc-r0drv-linux.c

Timestamp:

Aug 27, 2009 3:17:53 PM (15 years ago)

Author:

vboxsync

Message:

IPRT/r0drv/Linux: fixed comments about allocations

File:

trunk/src/VBox/Runtime/r0drv/linux/alloc-r0drv-linux.c

-              r22508
+              r22531
     cOrder = CalcPowerOf2Order(cPages);
 #if (defined(RT_ARCH_AMD64) || defined(CONFIG_X86_PAE)) && defined(GFP_DMA32)
+    /* ZONE_DMA32: 0-4GB */
     paPages = alloc_pages(GFP_DMA32, cOrder);
     if (!paPages)
 #endif
 #ifdef RT_ARCH_AMD64
+        /* ZONE_DMA; 0-16MB */
         paPages = alloc_pages(GFP_DMA, cOrder);
 #else
+# if defined(CONFIG_X86_PAE)
+    /** GFP_USER can return page frames above 4GB on PAE systems => GFP_DMA? */
+# endif
+        /* ZONE_NORMAL: 0-896MB */
         paPages = alloc_pages(GFP_USER, cOrder);
 #endif

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