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Adds reading pages into page-cache in an ordered manner.

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Added reading pages from the page cache into user buffer for sys_read.
Increases stack sizes to 4 pages.
Updated README to include more details about multi-pager environments.
This commit is contained in:
Bahadir Balban
2008-02-27 01:17:36 +00:00
parent 2a5cdf80b5
commit 0c9b42121a
9 changed files with 144 additions and 76 deletions
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6
tasks/mm0/src/task.c
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@@ -127,9 +127,9 @@ int start_boot_tasks(struct initdata *initdata, struct tcb_head *tcbs)
goto error;
}
/* mmap each task's stack as single page anonymous memory. */
if ((err = do_mmap(0, 0, task, USER_AREA_END - PAGE_SIZE,
VM_READ | VM_WRITE | VMA_ANON, 1) < 0)) {
/* mmap each task's stack as 4-page anonymous memory. */
if ((err = do_mmap(0, 0, task, USER_AREA_END - PAGE_SIZE * 4,
VM_READ | VM_WRITE | VMA_ANON, 4) < 0)) {
printf("do_mmap: Mapping stack failed with %d.\n", err);
goto error;
}