.

wcfs/internal/wcfs_virtmem.cpp

@@ -22,6 +22,23 @@
 // XXX provides isolated view.
 
 // XXX wcfs_virtmem organization.
+//
+// - need to maintain pinner map registry
+//
+//      [blk< +len) -> vma      ↓blk
+//      #blk        -> []vma covering it
+//
+// - we can reuse virtmem code:
+//
+//   XXX review text
+//
+//   if RW page is added to mapping, pinner does not need to split the mmap -
+//   it just needs to check before overwriting that page with @revX/data
+//   whether RAM page was mmaped by virtmem or not. If RW page is already
+//   there, pinner does not overwrite it.
+//
+//   RW -> Uptodate: Virtmem calls pinner to remmap the page RO after commit or
+//   abort.
 
 #include "wcfs_misc.h"
 #include "wcfs.h"