Changeset 610 for trunk/kernel/mm/ppm.h

Timestamp:

Dec 27, 2018, 7:38:58 PM (5 years ago)

Author:

alain

Message:

Fix several bugs in VFS to support the following
ksh commandis : cp, mv, rm, mkdir, cd, pwd

File:

• trunk/kernel/mm/ppm.h (modified) (3 diffs)

trunk/kernel/mm/ppm.h

@@ -62 +62 @@
  * also rooted in the PPM, in order to be able to save all dirty pages on disk.
  * This dirty list is protected by a specific remote_queuelock, because it can be
- * modified by a remote thread, but it is implemented as a local list, because it
- * contains only local pages.
+ * modified by a remote thread, but it contains only local pages.
  ****************************************************************************************/
 
@@ -193 +192 @@
  * It can be called by a thread running in any cluster.
  * - it takes the queuelock protecting the PPM dirty_list.
+ * - it takes the busylock protecting the page flags.
  * - it test the PG_DIRTY flag in the page descriptor.
  *   . if page already dirty => do nothing
  *   . it page not dirty => set the PG_DIRTY flag and register page in PPM dirty list.
+ * - it releases the busylock protcting the page flags.
  * - it releases the queuelock protecting the PPM dirty_list.
  *****************************************************************************************
@@ -207 +208 @@
  * It can be called by a thread running in any cluster.
  * - it takes the queuelock protecting the PPM dirty_list.
+ * - it takes the busylock protecting the page flags.
  * - it test the PG_DIRTY flag in the page descriptor.
  *   . if page not dirty => do nothing
  *   . it page dirty => reset the PG_DIRTY flag and remove page from PPM dirty list.
+ * - it releases the busylock protcting the page flags.
  * - it releases the queuelock protecting the PPM dirty_list.
  *****************************************************************************************