Changeset 635 for trunk/kernel/mm/page.h

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/page.h (modified) (2 diffs)

trunk/kernel/mm/page.h

@@ -48 +48 @@
  * This structure defines a physical page descriptor.
  * - The remote_busylock is used to allows any remote thread to atomically
- *   test/modify the forks counter or the page flags.
+ *   test/modify the forks counter or the flags.
  * - The list entry is used to register the page in a free list or in dirty list.
  *   The refcount is used for page release to KMEM.
@@ -133 +133 @@
 
 
+
+/*************************************************************************************
+ * This function must be called by a thread running in the local cluster.
+ * It initializes the page descriptor.
+ *************************************************************************************
+ * @ page_xp    : extended pointer to page descriptor.
+ ************************************************************************************/
+inline void page_remote_init( xptr_t  page_xp );
+
 /*************************************************************************************
  * This function can be called by any thread running in any cluster.