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Date: Thu, 27 Apr 2017 00:17:21 +0800
From: Chao Yu <chao@...nel.org>
To: jaegeuk@...nel.org
Cc: linux-f2fs-devel@...ts.sourceforge.net,
linux-kernel@...r.kernel.org, Chao Yu <yuchao0@...wei.com>,
Hou Pengyang <houpengyang@...wei.com>
Subject: [PATCH RESEND v2] f2fs: release cp and dnode lock before IPU
From: Hou Pengyang <houpengyang@...wei.com>
We don't need to rewrite the page under cp_rwsem and dnode locks.
Signed-off-by: Hou Pengyang <houpengyang@...wei.com>
Signed-off-by: Chao Yu <yuchao0@...wei.com>
Signed-off-by: Jaegeuk Kim <jaegeuk@...nel.org>
---
fs/f2fs/data.c | 39 ++++++++++++++++++++++++---------------
fs/f2fs/f2fs.h | 2 +-
fs/f2fs/gc.c | 1 +
fs/f2fs/segment.c | 1 +
4 files changed, 27 insertions(+), 16 deletions(-)
diff --git a/fs/f2fs/data.c b/fs/f2fs/data.c
index ca21ecbd6bbd..632008241470 100644
--- a/fs/f2fs/data.c
+++ b/fs/f2fs/data.c
@@ -1361,12 +1361,17 @@ int do_write_data_page(struct f2fs_io_info *fio)
if (fio->old_blkaddr != NULL_ADDR &&
fio->old_blkaddr != NEW_ADDR) {
ipu_force = true;
+ fio->need_lock = false;
goto got_it;
}
}
+
+ if (fio->need_lock)
+ f2fs_lock_op(fio->sbi);
+
err = get_dnode_of_data(&dn, page->index, LOOKUP_NODE);
if (err)
- return err;
+ goto out;
fio->old_blkaddr = dn.data_blkaddr;
@@ -1387,22 +1392,26 @@ int do_write_data_page(struct f2fs_io_info *fio)
* it had better in-place writes for updated data.
*/
if (ipu_force || need_inplace_update(fio)) {
- f2fs_bug_on(fio->sbi, !fio->cp_rwsem_locked);
- f2fs_unlock_op(fio->sbi);
- fio->cp_rwsem_locked = false;
-
+ f2fs_put_dnode(&dn);
+ if (fio->need_lock)
+ f2fs_unlock_op(fio->sbi);
err = rewrite_data_page(fio);
trace_f2fs_do_write_data_page(fio->page, IPU);
set_inode_flag(inode, FI_UPDATE_WRITE);
- } else {
- write_data_page(&dn, fio);
- trace_f2fs_do_write_data_page(page, OPU);
- set_inode_flag(inode, FI_APPEND_WRITE);
- if (page->index == 0)
- set_inode_flag(inode, FI_FIRST_BLOCK_WRITTEN);
+ return err;
}
+
+ /* LFS mode write path */
+ write_data_page(&dn, fio);
+ trace_f2fs_do_write_data_page(page, OPU);
+ set_inode_flag(inode, FI_APPEND_WRITE);
+ if (page->index == 0)
+ set_inode_flag(inode, FI_FIRST_BLOCK_WRITTEN);
out_writepage:
f2fs_put_dnode(&dn);
+out:
+ if (fio->need_lock)
+ f2fs_unlock_op(fio->sbi);
return err;
}
@@ -1427,7 +1436,7 @@ static int __write_data_page(struct page *page, bool *submitted,
.page = page,
.encrypted_page = NULL,
.submitted = false,
- .cp_rwsem_locked = true,
+ .need_lock = true,
};
trace_f2fs_writepage(page, DATA);
@@ -1463,6 +1472,7 @@ static int __write_data_page(struct page *page, bool *submitted,
/* Dentry blocks are controlled by checkpoint */
if (S_ISDIR(inode->i_mode)) {
+ fio.need_lock = false;
err = do_write_data_page(&fio);
goto done;
}
@@ -1480,13 +1490,12 @@ static int __write_data_page(struct page *page, bool *submitted,
if (!err)
goto out;
}
- f2fs_lock_op(sbi);
+
if (err == -EAGAIN)
err = do_write_data_page(&fio);
if (F2FS_I(inode)->last_disk_size < psize)
F2FS_I(inode)->last_disk_size = psize;
- if (fio.cp_rwsem_locked)
- f2fs_unlock_op(sbi);
+
done:
if (err && err != -ENOENT)
goto redirty_out;
diff --git a/fs/f2fs/f2fs.h b/fs/f2fs/f2fs.h
index bf48213642ab..95fb347e7abe 100644
--- a/fs/f2fs/f2fs.h
+++ b/fs/f2fs/f2fs.h
@@ -802,7 +802,7 @@ struct f2fs_io_info {
struct page *page; /* page to be written */
struct page *encrypted_page; /* encrypted page */
bool submitted; /* indicate IO submission */
- bool cp_rwsem_locked; /* indicate cp_rwsem is held */
+ bool need_lock; /* indicate we need to lock cp_rwsem */
};
#define is_read_io(rw) ((rw) == READ)
diff --git a/fs/f2fs/gc.c b/fs/f2fs/gc.c
index c2a9ae8397d3..ffabdcf52b85 100644
--- a/fs/f2fs/gc.c
+++ b/fs/f2fs/gc.c
@@ -717,6 +717,7 @@ static void move_data_page(struct inode *inode, block_t bidx, int gc_type,
.old_blkaddr = NULL_ADDR,
.page = page,
.encrypted_page = NULL,
+ .need_lock = false,
};
bool is_dirty = PageDirty(page);
int err;
diff --git a/fs/f2fs/segment.c b/fs/f2fs/segment.c
index 4ba61ca430d0..63ea066f7dc0 100644
--- a/fs/f2fs/segment.c
+++ b/fs/f2fs/segment.c
@@ -293,6 +293,7 @@ static int __commit_inmem_pages(struct inode *inode,
.op_flags = REQ_SYNC | REQ_PRIO,
.old_blkaddr = NULL_ADDR,
.encrypted_page = NULL,
+ .need_lock = false,
};
pgoff_t last_idx = ULONG_MAX;
int err = 0;
--
2.12.2.575.gb14f27f
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