Changeset 672 for trunk/kernel/mm/kcm.h

Timestamp:

Nov 19, 2020, 11:49:01 PM (3 years ago)

Author:

alain

Message:

1) Introduce up to 4 command lines arguments in the KSH "load" command.
These arguments are transfered to the user process through the
argc/argv mechanism, using the user space "args" vseg.

2) Introduce the named and anonymous "pipes", for inter-process communication
through the pipe() and mkfifo() syscalls.

3) Introduce the "chat" application to validate the two above mechanisms.

4) Improve printk() and assert() fonctions in printk.c.

File:

• trunk/kernel/mm/kcm.h (modified) (4 diffs)

trunk/kernel/mm/kcm.h

@@ -2 +2 @@
  * kcm.h - Kernel Cache Manager definition.
  *
- * Authors    Alain Greiner (2016,2017,2018,2019)
+ * Authors    Alain Greiner (2016,2017,2018,2019,2020)
  *
  * Copyright (c) UPMC Sorbonne Universites
@@ -58 +58 @@
         list_entry_t         active_root;      /*! root of active pages list               */
 
-        uint32_t             full_pages_nr;    /*! number of busy pages                    */
+        uint32_t             full_pages_nr;    /*! number of full pages                    */
         uint32_t             active_pages_nr;  /*! number of active pages                  */
 
@@ -69 +69 @@
 /****************************************************************************************
  * This structure defines a KCM-page descriptor.
- * A KCM-page contains at most (CONFIG_PPM_PAGE_SIZE / CONFIG_KCM_SLOT_SIZE) slots,
- * and each slot contains one block. The kcm page descriptor is stored in first slot.
+ * A KCM-page contains (CONFIG_PPM_PAGE_SIZE / block_size) slots. 
+ * Each slot contains one block, but the kcm page descriptor is stored in first slot.
  * The current allocation status is defined by the 64 bits "status" bit vector: each
- * non zero bit defines an allocated block / "counts is the number of allocated blocks. 
- * Each kcm_page is registered in one of the two following page_list:
+ * non zero bit defines an allocated block / "count" is the number of allocated blocks. 
+ * Each kcm_page is registered in one of the two following lists, rooted in the kcm:
  * - full   : when count == max
  * - active : count < max 
@@ -148 +148 @@
 
 /****************************************************************************************
- * This debug function can be called by any thread running in any cluster. 
- * It diplays on TXT0 the current state of a local KCM allocator.
+ * This debug function can be called by any thread running in any cluster. It displays
+ * on TXT0 the state of a KCM, identified by the <kcm_cxy> & <kcm_ptr> arguments.
  ****************************************************************************************
  * @ kcm_cxy : remote KCM cluster identifier.