Hello Alan,
I use it all the time and it is not pre6 stuff related...:-)
Thanks,
Dieter
--- linux/mm/filemap.c Mon May 28 13:31:49 2001
+++ linux/mm/filemap.c Mon Jun 11 23:31:08 2001
@@ -230,17 +230,17 @@
unsigned long offset;
page = list_entry(curr, struct page, list);
- curr = curr->next;
offset = page->index;
/* Is one of the pages to truncate? */
if ((offset >= start) || (*partial && (offset + 1) == start))
{
+ list_del(head);
+ list_add(head, curr);
if (TryLockPage(page)) {
page_cache_get(page);
spin_unlock(&pagecache_lock);
wait_on_page(page);
- page_cache_release(page);
- return 1;
+ goto out_restart;
}
page_cache_get(page);
spin_unlock(&pagecache_lock);
@@ -252,11 +252,15 @@
truncate_complete_page(page);
UnlockPage(page);
- page_cache_release(page);
- return 1;
+ goto out_restart;
}
+ curr = curr->next;
}
return 0;
+out_restart:
+ page_cache_release(page);
+ spin_lock(&pagecache_lock);
+ return 1;
}
@@ -273,15 +277,19 @@
{
unsigned long start = (lstart + PAGE_CACHE_SIZE - 1) >>
PAGE_CACHE_SHIFT;
unsigned partial = lstart & (PAGE_CACHE_SIZE - 1);
+ int complete;
-repeat:
spin_lock(&pagecache_lock);
- if (truncate_list_pages(&mapping->clean_pages, start, &partial))
- goto repeat;
- if (truncate_list_pages(&mapping->dirty_pages, start, &partial))
- goto repeat;
- if (truncate_list_pages(&mapping->locked_pages, start, &partial))
- goto repeat;
+ do {
+ complete = 1;
+ while (truncate_list_pages(&mapping->clean_pages, start,
&partial))
+ complete = 0;
+ while (truncate_list_pages(&mapping->dirty_pages, start,
&partial))
+ complete = 0;
+ while (truncate_list_pages(&mapping->locked_pages, start,
&partial))
+ complete = 0;
+ } while (!complete);
+ /* Traversed all three lists without dropping the lock */
spin_unlock(&pagecache_lock);
}
-
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This archive was generated by hypermail 2b29 : Sat Jun 23 2001 - 21:00:35 EST