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authorTheodore Ts'o <tytso@mit.edu>2009-08-31 23:13:11 -0400
committerTheodore Ts'o <tytso@mit.edu>2009-08-31 23:13:11 -0400
commitb3a3ca8ca0c3c29abc5b2bfe94bb14f3f4590df9 (patch)
tree1006f780d43ec8ff90ed11b1eb0d5ed961c9f613 /fs
parentde89de6e0cf4b1eb13f27137cf2aa40d287aabdf (diff)
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ext4: Add new tracepoint: trace_ext4_da_write_pages()
Add a new tracepoint which shows the pages that will be written using write_cache_pages() by ext4_da_writepages(). Signed-off-by: "Theodore Ts'o" <tytso@mit.edu>
Diffstat (limited to 'fs')
-rw-r--r--fs/ext4/ext4.h15
-rw-r--r--fs/ext4/inode.c13
2 files changed, 16 insertions, 12 deletions
diff --git a/fs/ext4/ext4.h b/fs/ext4/ext4.h
index 41a76e163b99..81014f4ed22d 100644
--- a/fs/ext4/ext4.h
+++ b/fs/ext4/ext4.h
@@ -114,6 +114,21 @@ struct ext4_allocation_request {
};
/*
+ * For delayed allocation tracking
+ */
+struct mpage_da_data {
+ struct inode *inode;
+ sector_t b_blocknr; /* start block number of extent */
+ size_t b_size; /* size of extent */
+ unsigned long b_state; /* state of the extent */
+ unsigned long first_page, next_page; /* extent of pages */
+ struct writeback_control *wbc;
+ int io_done;
+ int pages_written;
+ int retval;
+};
+
+/*
* Special inodes numbers
*/
#define EXT4_BAD_INO 1 /* Bad blocks inode */
diff --git a/fs/ext4/inode.c b/fs/ext4/inode.c
index ff659e757578..17802a96af9f 100644
--- a/fs/ext4/inode.c
+++ b/fs/ext4/inode.c
@@ -1875,18 +1875,6 @@ static void ext4_da_page_release_reservation(struct page *page,
* Delayed allocation stuff
*/
-struct mpage_da_data {
- struct inode *inode;
- sector_t b_blocknr; /* start block number of extent */
- size_t b_size; /* size of extent */
- unsigned long b_state; /* state of the extent */
- unsigned long first_page, next_page; /* extent of pages */
- struct writeback_control *wbc;
- int io_done;
- int pages_written;
- int retval;
-};
-
/*
* mpage_da_submit_io - walks through extent of pages and try to write
* them with writepage() call back
@@ -2863,6 +2851,7 @@ retry:
mpd.io_done = 1;
ret = MPAGE_DA_EXTENT_TAIL;
}
+ trace_ext4_da_write_pages(inode, &mpd);
wbc->nr_to_write -= mpd.pages_written;
ext4_journal_stop(handle);
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