Changeset 635 for trunk/kernel/kern/chdev.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/kern/chdev.c (modified) (1 diff)

trunk/kernel/kern/chdev.c

@@ -90 +90 @@
 
     // allocate memory for chdev
-    req.type   = KMEM_DEVICE;
-    req.flags  = AF_ZERO;
-    chdev      = (chdev_t *)kmem_alloc( &req );
+    req.type   = KMEM_KCM;
+    req.order  = bits_log2( sizeof(chdev_t) );
+    req.flags  = AF_ZERO | AF_KERNEL;
+    chdev      = kmem_alloc( &req );
 
     if( chdev == NULL ) return NULL;