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Message-ID: <20170321120945.76050-1-yuchao0@huawei.com>
Date: Tue, 21 Mar 2017 20:09:44 +0800
From: Chao Yu <yuchao0@...wei.com>
To: <jaegeuk@...nel.org>
CC: <linux-f2fs-devel@...ts.sourceforge.net>,
<linux-kernel@...r.kernel.org>, <chao@...nel.org>,
Chao Yu <yuchao0@...wei.com>
Subject: [PATCH 1/2] f2fs: introduce __drop_inmem_page
Introduce a separated inner help __drop_inmem_page in order to:
a. enhance readability,
b. use INMEM_INVALIDATE for better tracing,
c. avoid useless loop.
Signed-off-by: Chao Yu <yuchao0@...wei.com>
---
fs/f2fs/data.c | 2 +-
fs/f2fs/f2fs.h | 1 +
fs/f2fs/segment.c | 47 ++++++++++++++++++++++++++++++++++-----------
include/trace/events/f2fs.h | 2 ++
4 files changed, 40 insertions(+), 12 deletions(-)
diff --git a/fs/f2fs/data.c b/fs/f2fs/data.c
index f4b3006e3ecb..2d23c1f3d0f6 100644
--- a/fs/f2fs/data.c
+++ b/fs/f2fs/data.c
@@ -1967,7 +1967,7 @@ void f2fs_invalidate_page(struct page *page, unsigned int offset,
/* This is atomic written page, keep Private */
if (IS_ATOMIC_WRITTEN_PAGE(page))
- drop_inmem_page(inode, page);
+ return drop_inmem_page(inode, page);
set_page_private(page, 0);
ClearPagePrivate(page);
diff --git a/fs/f2fs/f2fs.h b/fs/f2fs/f2fs.h
index 44c6c72d5e7d..82ddf5649d68 100644
--- a/fs/f2fs/f2fs.h
+++ b/fs/f2fs/f2fs.h
@@ -720,6 +720,7 @@ enum page_type {
META_FLUSH,
INMEM, /* the below types are used by tracepoints only. */
INMEM_DROP,
+ INMEM_INVALIDATE,
INMEM_REVOKE,
IPU,
OPU,
diff --git a/fs/f2fs/segment.c b/fs/f2fs/segment.c
index 3e8d08722151..0bf024f62330 100644
--- a/fs/f2fs/segment.c
+++ b/fs/f2fs/segment.c
@@ -192,7 +192,7 @@ void register_inmem_page(struct inode *inode, struct page *page)
trace_f2fs_register_inmem_page(page, INMEM);
}
-static int __revoke_inmem_pages(struct inode *inode, struct page *p,
+static int __revoke_inmem_pages(struct inode *inode,
struct list_head *head, bool drop, bool recover)
{
struct f2fs_sb_info *sbi = F2FS_I_SB(inode);
@@ -205,10 +205,7 @@ static int __revoke_inmem_pages(struct inode *inode, struct page *p,
if (drop)
trace_f2fs_commit_inmem_page(page, INMEM_DROP);
- if (!p)
- lock_page(page);
- else if (p != page)
- continue;
+ lock_page(page);
if (recover) {
struct dnode_of_data dn;
@@ -232,7 +229,7 @@ static int __revoke_inmem_pages(struct inode *inode, struct page *p,
ClearPageUptodate(page);
set_page_private(page, 0);
ClearPagePrivate(page);
- f2fs_put_page(page, p ? 0 : 1);
+ f2fs_put_page(page, 1);
list_del(&cur->list);
kmem_cache_free(inmem_entry_slab, cur);
@@ -246,19 +243,47 @@ void drop_inmem_pages(struct inode *inode)
struct f2fs_inode_info *fi = F2FS_I(inode);
mutex_lock(&fi->inmem_lock);
- __revoke_inmem_pages(inode, NULL, &fi->inmem_pages, true, false);
+ __revoke_inmem_pages(inode, &fi->inmem_pages, true, false);
mutex_unlock(&fi->inmem_lock);
clear_inode_flag(inode, FI_ATOMIC_FILE);
stat_dec_atomic_write(inode);
}
+void __drop_inmem_page(struct inode *inode, struct page *page)
+{
+ struct f2fs_sb_info *sbi = F2FS_I_SB(inode);
+ struct list_head *head = &F2FS_I(inode)->inmem_pages;
+ struct inmem_pages *cur;
+
+ f2fs_bug_on(sbi, !IS_ATOMIC_WRITTEN_PAGE(page));
+
+ list_for_each_entry(cur, head, list) {
+ if (cur->page == page)
+ goto drop;
+ }
+
+ f2fs_bug_on(sbi, 1);
+ return;
+drop:
+ trace_f2fs_commit_inmem_page(page, INMEM_INVALIDATE);
+
+ ClearPageUptodate(page);
+ set_page_private(page, 0);
+ ClearPagePrivate(page);
+ f2fs_put_page(page, 0);
+
+ list_del(&cur->list);
+ kmem_cache_free(inmem_entry_slab, cur);
+ dec_page_count(sbi, F2FS_INMEM_PAGES);
+}
+
void drop_inmem_page(struct inode *inode, struct page *page)
{
struct f2fs_inode_info *fi = F2FS_I(inode);
mutex_lock(&fi->inmem_lock);
- __revoke_inmem_pages(inode, page, &fi->inmem_pages, true, false);
+ __drop_inmem_page(inode, page);
mutex_unlock(&fi->inmem_lock);
}
@@ -312,7 +337,7 @@ static int __commit_inmem_pages(struct inode *inode,
DATA, WRITE);
if (!err)
- __revoke_inmem_pages(inode, NULL, revoke_list, false, false);
+ __revoke_inmem_pages(inode, revoke_list, false, false);
return err;
}
@@ -342,13 +367,13 @@ int commit_inmem_pages(struct inode *inode)
* recovery or rewrite & commit last transaction. For other
* error number, revoking was done by filesystem itself.
*/
- ret = __revoke_inmem_pages(inode, NULL, &revoke_list,
+ ret = __revoke_inmem_pages(inode, &revoke_list,
false, true);
if (ret)
err = ret;
/* drop all uncommitted pages */
- __revoke_inmem_pages(inode, NULL, &fi->inmem_pages,
+ __revoke_inmem_pages(inode, &fi->inmem_pages,
true, false);
}
mutex_unlock(&fi->inmem_lock);
diff --git a/include/trace/events/f2fs.h b/include/trace/events/f2fs.h
index 16fcd192e257..1714c75822de 100644
--- a/include/trace/events/f2fs.h
+++ b/include/trace/events/f2fs.h
@@ -15,6 +15,7 @@ TRACE_DEFINE_ENUM(META);
TRACE_DEFINE_ENUM(META_FLUSH);
TRACE_DEFINE_ENUM(INMEM);
TRACE_DEFINE_ENUM(INMEM_DROP);
+TRACE_DEFINE_ENUM(INMEM_INVALIDATE);
TRACE_DEFINE_ENUM(INMEM_REVOKE);
TRACE_DEFINE_ENUM(IPU);
TRACE_DEFINE_ENUM(OPU);
@@ -52,6 +53,7 @@ TRACE_DEFINE_ENUM(CP_DISCARD);
{ META_FLUSH, "META_FLUSH" }, \
{ INMEM, "INMEM" }, \
{ INMEM_DROP, "INMEM_DROP" }, \
+ { INMEM_INVALIDATE, "INMEM_INVALIDATE" }, \
{ INMEM_REVOKE, "INMEM_REVOKE" }, \
{ IPU, "IN-PLACE" }, \
{ OPU, "OUT-OF-PLACE" })
--
2.8.2.295.g3f1c1d0
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