Changeset 625 for trunk/kernel/syscalls/sys_write.c

Timestamp:

Apr 10, 2019, 10:09:39 AM (5 years ago)

Author:

alain

Message:

Fix a bug in the vmm_remove_vseg() function: the physical pages
associated to an user DATA vseg were released to the kernel when
the target process descriptor was in the reference cluster.
This physical pages release should be done only when the page
forks counter value is zero.
All other modifications are cosmetic.

File:

• trunk/kernel/syscalls/sys_write.c (modified) (4 diffs)

trunk/kernel/syscalls/sys_write.c

@@ -2 +2 @@
  * sys_write.c - Kernel function implementing the "write" system call.
  * 
- * Author        Alain Greiner (2016,2017,2018)
+ * Author        Alain Greiner (2016,2017,2018,2019)
  *
  * Copyright (c) UPMC Sorbonne Universites
@@ -76 +76 @@
 
 #if DEBUG_SYS_WRITE
-tm_start = hal_get_cycles();
 if( DEBUG_SYS_WRITE < tm_start )
-printk("\n[%s] thread[%x,%x] enter / vaddr %x / count %d / cycle %d\n",
+printk("\n[%s] thread[%x,%x] enter / vaddr %x / %d bytes / cycle %d\n",
 __FUNCTION__, process->pid, this->trdid, vaddr, count, (uint32_t)tm_start );
 #endif
@@ -140 +139 @@
     hal_enable_irq( &save_sr );
 
-   // action depend on file type
-    if( file_type == INODE_TYPE_FILE )  // write to file mapper 
+    // action depend on file type
+    if( file_type == INODE_TYPE_FILE )  // write to a file mapper 
     {
         // check file writable
@@ -180 +179 @@
         xptr_t inode_xp = XPTR( file_cxy , inode_ptr );
         vfs_inode_update_size( inode_xp , file_offset + count );
-
     }
     else if( file_type == INODE_TYPE_DEV )  // write to TXT device