From: Kirill Tkhai <ktkhai@xxxxxxxxxxxxx>
Call sb_issue_allocate() after extent range was allocated on user
request. Hopeful, this helps block device to maintain its internals in
the best way, if this is appliable.
Signed-off-by: Kirill Tkhai <ktkhai@xxxxxxxxxxxxx>
Signed-off-by: Chaitanya Kulkarni <chaitanya.kulkarni@xxxxxxx>
---
fs/ext4/ext4.h | 2 ++
fs/ext4/extents.c | 12 +++++++++++-
2 files changed, 13 insertions(+), 1 deletion(-)
diff --git a/fs/ext4/ext4.h b/fs/ext4/ext4.h
index 61b37a052052..0d0fa9904147 100644
--- a/fs/ext4/ext4.h
+++ b/fs/ext4/ext4.h
@@ -622,6 +622,8 @@ enum {
* allows jbd2 to avoid submitting data before commit. */
#define EXT4_GET_BLOCKS_IO_SUBMIT 0x0400
+#define EXT4_GET_BLOCKS_SUBMIT_ALLOC 0x0800
+
/*
* The bit position of these flags must not overlap with any of the
* EXT4_GET_BLOCKS_*. They are used by ext4_find_extent(),
diff --git a/fs/ext4/extents.c b/fs/ext4/extents.c
index 954013d6076b..37a60e190349 100644
--- a/fs/ext4/extents.c
+++ b/fs/ext4/extents.c
@@ -4449,6 +4449,14 @@ int ext4_ext_map_blocks(handle_t *handle, struct inode *inode,
ar.len = allocated;
got_allocated_blocks:
+ if ((flags & EXT4_GET_BLOCKS_SUBMIT_ALLOC) &&
+ inode->i_fop->fallocate) {
+ err = sb_issue_allocate(inode->i_sb, newblock,
+ EXT4_C2B(sbi, allocated_clusters), GFP_NOFS);
+ if (err)
+ goto free_on_err;
+ }
+
/* try to insert new extent into found leaf and return */
ext4_ext_store_pblock(&newex, newblock + offset);
newex.ee_len = cpu_to_le16(ar.len);
@@ -4466,6 +4474,7 @@ int ext4_ext_map_blocks(handle_t *handle, struct inode *inode,
err = ext4_ext_insert_extent(handle, inode, &path,
&newex, flags);
+free_on_err:
if (err && free_on_err) {
int fb_flags = flags & EXT4_GET_BLOCKS_DELALLOC_RESERVE ?
EXT4_FREE_BLOCKS_NO_QUOT_UPDATE : 0;
@@ -4733,7 +4742,8 @@ static long ext4_zero_range(struct file *file, loff_t offset,
goto out_mutex;
}
- flags = EXT4_GET_BLOCKS_CREATE_UNWRIT_EXT;
+ flags = EXT4_GET_BLOCKS_CREATE_UNWRIT_EXT |
+ EXT4_GET_BLOCKS_SUBMIT_ALLOC;
if (mode & FALLOC_FL_KEEP_SIZE)
flags |= EXT4_GET_BLOCKS_KEEP_SIZE;
--
2.22.0
