A fancier implementation could probably avoid an extra journal
transaction by adding a mapping_test_clear_cmtime call in
ext4_writepages, but this should already be a considerable
improvement -- we'll start one transaction per writepages call
instead of one per page.
Signed-off-by: Andy Lutomirski <luto@xxxxxxxxxxxxxx>
---
fs/ext4/inode.c | 4 +++-
1 file changed, 3 insertions(+), 1 deletion(-)
diff --git a/fs/ext4/inode.c b/fs/ext4/inode.c
index dd32a2e..cee6b45 100644
--- a/fs/ext4/inode.c
+++ b/fs/ext4/inode.c
@@ -3236,6 +3236,7 @@ static const struct address_space_operations ext4_aops = {
.readpages = ext4_readpages,
.writepage = ext4_writepage,
.writepages = ext4_writepages,
+ .flush_cmtime = generic_flush_cmtime,
.write_begin = ext4_write_begin,
.write_end = ext4_write_end,
.bmap = ext4_bmap,
@@ -3252,6 +3253,7 @@ static const struct address_space_operations ext4_journalled_aops = {
.readpages = ext4_readpages,
.writepage = ext4_writepage,
.writepages = ext4_writepages,
+ .flush_cmtime = generic_flush_cmtime,
.write_begin = ext4_write_begin,
.write_end = ext4_journalled_write_end,
.set_page_dirty = ext4_journalled_set_page_dirty,
@@ -3268,6 +3270,7 @@ static const struct address_space_operations ext4_da_aops = {
.readpages = ext4_readpages,
.writepage = ext4_writepage,
.writepages = ext4_writepages,
+ .flush_cmtime = generic_flush_cmtime,
.write_begin = ext4_da_write_begin,
.write_end = ext4_da_write_end,
.bmap = ext4_bmap,
@@ -5025,7 +5028,6 @@ int ext4_page_mkwrite(struct vm_area_struct *vma, struct vm_fault *vmf)
int retries = 0;
sb_start_pagefault(inode->i_sb);
- file_update_time(vma->vm_file);
/* Delalloc case is easy... */
if (test_opt(inode->i_sb, DELALLOC) &&
!ext4_should_journal_data(inode) &&
--
1.8.3.1
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