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Forks and COW situations show that we need vm objects rather than vm_files.

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This is the first commit towards implementing vm object based paging with
right COW methods.
This commit is contained in:
Bahadir Balban
2008-03-03 22:05:01 +00:00
parent e2e6c89da2
commit 58b833dd7f
11 changed files with 272 additions and 139 deletions
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14
tasks/mm0/include/task.h
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@@ -1,7 +1,7 @@
/*
* Thread control block.
*
* Copyright (C) 2007 Bahadir Balban
* Copyright (C) 2007, 2008 Bahadir Balban
*/
#ifndef __TASK_H__
#define __TASK_H__
@@ -18,9 +18,6 @@
#define TASK_OFILES_MAX 32
/* Allow per-task anonymous memory to grow as much as 1 MB for now. */
#define TASK_SWAPFILE_MAXSIZE SZ_1MB
struct vm_file;
struct file_descriptor {
@@ -78,12 +75,6 @@ struct tcb {
/* File descriptors for this task */
struct file_descriptor fd[TASK_OFILES_MAX];
/* Per-task swap file for now */
struct vm_file *swap_file;
/* Pool to generate swap file offsets for fileless anonymous regions */
struct address_pool swap_file_offset_pool;
};
struct tcb *find_task(int tid);
@@ -95,7 +86,4 @@ void dump_tasks(void);
void send_task_data(l4id_t requester);
/* Used by servers that have a reference to tcbs (e.g. a pager) */
#define current ((struct ktcb *)__L4_ARM_Utcb()->usr_handle)
#endif /* __TASK_H__ */