Gitweb:
http://git.kernel.org/git/?p=linux/kernel/git/torvalds/linux-2.6.git;a=commit;h=34901f70d119d88126e7390351b8c780646628e1
Commit: 34901f70d119d88126e7390351b8c780646628e1
Parent: ed90ef51a33f572fa7d00c8b05f7457be727e74f
Author: Trond Myklebust <[EMAIL PROTECTED]>
AuthorDate: Wed Jul 25 14:09:54 2007 -0400
Committer: Trond Myklebust <[EMAIL PROTECTED]>
CommitDate: Tue Oct 9 17:15:21 2007 -0400
NFS: Writeback optimisation
Schedule writes using WB_SYNC_NONE first, then come back for a second pass
using WB_SYNC_ALL.
Signed-off-by: Trond Myklebust <[EMAIL PROTECTED]>
---
fs/nfs/write.c | 32 ++++++++++++++++++++++----------
1 files changed, 22 insertions(+), 10 deletions(-)
diff --git a/fs/nfs/write.c b/fs/nfs/write.c
index 75adb8e..b3c5f5d 100644
--- a/fs/nfs/write.c
+++ b/fs/nfs/write.c
@@ -1325,21 +1325,14 @@ long nfs_sync_mapping_wait(struct address_space
*mapping, struct writeback_contr
return ret;
}
-static int nfs_write_mapping(struct address_space *mapping, int how)
+static int __nfs_write_mapping(struct address_space *mapping, struct
writeback_control *wbc, int how)
{
- struct writeback_control wbc = {
- .bdi = mapping->backing_dev_info,
- .sync_mode = WB_SYNC_ALL,
- .nr_to_write = LONG_MAX,
- .for_writepages = 1,
- .range_cyclic = 1,
- };
int ret;
- ret = nfs_writepages(mapping, &wbc);
+ ret = nfs_writepages(mapping, wbc);
if (ret < 0)
goto out;
- ret = nfs_sync_mapping_wait(mapping, &wbc, how);
+ ret = nfs_sync_mapping_wait(mapping, wbc, how);
if (ret < 0)
goto out;
return 0;
@@ -1348,6 +1341,25 @@ out:
return ret;
}
+/* Two pass sync: first using WB_SYNC_NONE, then WB_SYNC_ALL */
+static int nfs_write_mapping(struct address_space *mapping, int how)
+{
+ struct writeback_control wbc = {
+ .bdi = mapping->backing_dev_info,
+ .sync_mode = WB_SYNC_NONE,
+ .nr_to_write = LONG_MAX,
+ .for_writepages = 1,
+ .range_cyclic = 1,
+ };
+ int ret;
+
+ ret = __nfs_write_mapping(mapping, &wbc, how);
+ if (ret < 0)
+ return ret;
+ wbc.sync_mode = WB_SYNC_ALL;
+ return __nfs_write_mapping(mapping, &wbc, how);
+}
+
/*
* flush the inode to disk.
*/
-
To unsubscribe from this list: send the line "unsubscribe git-commits-head" in
the body of a message to [EMAIL PROTECTED]
More majordomo info at http://vger.kernel.org/majordomo-info.html
