Changeset 635 for trunk/kernel/mm/vseg.c

Timestamp:

Jun 26, 2019, 11:42:37 AM (5 years ago)

Author:

alain

Message:

This version is a major evolution: The physical memory allocators,
defined in the kmem.c, ppm.c, and kcm.c files have been modified
to support remote accesses. The RPCs that were previously user
to allocate physical memory in a remote cluster have been removed.
This has been done to cure a dead-lock in case of concurrent page-faults.

This version 2.2 has been tested on a (4 clusters / 2 cores per cluster)
TSAR architecture, for both the "sort" and the "fft" applications.

File:

• trunk/kernel/mm/vseg.c (modified) (3 diffs)

trunk/kernel/mm/vseg.c

@@ -2 +2 @@
  * vseg.c - virtual segment (vseg) related operations
  *
- * Authors   Ghassan Almaless (2008,2009,2010,2011, 2012)
- *           Mohamed Lamine Karaoui (2015)
- *           Alain Greiner (2016,2017,2018,2019)
+ * Authors   Alain Greiner (2016,2017,2018,2019)
  *
  * Copyright (c) UPMC Sorbonne Universites
@@ -66 +64 @@
     kmem_req_t   req;
 
-    req.type  = KMEM_VSEG;
-        req.size  = sizeof(vseg_t);
-        req.flags = AF_KERNEL;
-
-    return (vseg_t *)kmem_alloc( &req );
+    req.type  = KMEM_KCM;
+        req.order = bits_log2( sizeof(vseg_t) );
+        req.flags = AF_KERNEL | AF_ZERO;
+
+    return kmem_alloc( &req );
 }
 
@@ -78 +76 @@
     kmem_req_t  req;
 
-        req.type = KMEM_VSEG;
+        req.type = KMEM_KCM;
         req.ptr  = vseg;
         kmem_free( &req );