aboutsummaryrefslogtreecommitdiffstats
path: root/include/linux/raid/bitmap.h
diff options
context:
space:
mode:
Diffstat (limited to 'include/linux/raid/bitmap.h')
-rw-r--r--include/linux/raid/bitmap.h13
1 files changed, 2 insertions, 11 deletions
diff --git a/include/linux/raid/bitmap.h b/include/linux/raid/bitmap.h
index f785cf26cbad..cfe60cfc8f3d 100644
--- a/include/linux/raid/bitmap.h
+++ b/include/linux/raid/bitmap.h
@@ -233,21 +233,12 @@ struct bitmap {
233 unsigned long daemon_sleep; /* how many seconds between updates? */ 233 unsigned long daemon_sleep; /* how many seconds between updates? */
234 234
235 /* 235 /*
236 * bitmap write daemon - this daemon performs writes to the bitmap file 236 * bitmap_writeback_daemon waits for file-pages that have been written,
237 * this thread is only needed because of a limitation in ext3 (jbd) 237 * as there is no way to get a call-back when a page write completes.
238 * that does not allow a task to have two journal transactions ongoing
239 * simultaneously (even if the transactions are for two different
240 * filesystems) -- in the case of bitmap, that would be the filesystem
241 * that the bitmap file resides on and the filesystem that is mounted
242 * on the md device -- see current->journal_info in jbd/transaction.c
243 */ 238 */
244 mdk_thread_t *writeback_daemon; 239 mdk_thread_t *writeback_daemon;
245 spinlock_t write_lock; 240 spinlock_t write_lock;
246 struct semaphore write_ready;
247 struct semaphore write_done;
248 unsigned long writes_pending;
249 wait_queue_head_t write_wait; 241 wait_queue_head_t write_wait;
250 struct list_head write_pages;
251 struct list_head complete_pages; 242 struct list_head complete_pages;
252 mempool_t *write_pool; 243 mempool_t *write_pool;
253}; 244};