The patch titled
fs: buffer trylock rename
has been removed from the -mm tree. Its filename was
fs-buffer-trylock-rename.patch
This patch was dropped because of too much breakage
------------------------------------------------------
Subject: fs: buffer trylock rename
From: Nick Piggin <npiggin@xxxxxxx>
Converting the buffer lock to new bitops also requires name change, so convert
the raw test_and_set bitop to a trylock.
Signed-off-by: Nick Piggin <npiggin@xxxxxxx>
Reviewed-by: Peter Zijlstra <a.p.zijlstra@xxxxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
---
fs/buffer.c | 4 ++--
fs/jbd/commit.c | 2 +-
fs/jbd2/commit.c | 2 +-
fs/ntfs/aops.c | 2 +-
fs/ntfs/compress.c | 2 +-
fs/ntfs/mft.c | 4 ++--
fs/reiserfs/inode.c | 2 +-
fs/reiserfs/journal.c | 4 ++--
include/linux/buffer_head.h | 8 ++++++--
9 files changed, 17 insertions(+), 13 deletions(-)
diff -puN fs/buffer.c~fs-buffer-trylock-rename fs/buffer.c
--- a/fs/buffer.c~fs-buffer-trylock-rename
+++ a/fs/buffer.c
@@ -1688,7 +1688,7 @@ static int __block_write_full_page(struc
*/
if (wbc->sync_mode != WB_SYNC_NONE || !wbc->nonblocking) {
lock_buffer(bh);
- } else if (test_set_buffer_locked(bh)) {
+ } else if (!trylock_buffer(bh)) {
redirty_page_for_writepage(wbc, page);
continue;
}
@@ -2927,7 +2927,7 @@ void ll_rw_block(int rw, int nr, struct
if (rw == SWRITE)
lock_buffer(bh);
- else if (test_set_buffer_locked(bh))
+ else if (!trylock_buffer(bh))
continue;
if (rw == WRITE || rw == SWRITE) {
diff -puN fs/jbd/commit.c~fs-buffer-trylock-rename fs/jbd/commit.c
--- a/fs/jbd/commit.c~fs-buffer-trylock-rename
+++ a/fs/jbd/commit.c
@@ -208,7 +208,7 @@ write_out_data:
* blocking lock_buffer().
*/
if (buffer_dirty(bh)) {
- if (test_set_buffer_locked(bh)) {
+ if (!trylock_buffer(bh)) {
BUFFER_TRACE(bh, "needs blocking lock");
spin_unlock(&journal->j_list_lock);
/* Write out all data to prevent deadlocks */
diff -puN fs/jbd2/commit.c~fs-buffer-trylock-rename fs/jbd2/commit.c
--- a/fs/jbd2/commit.c~fs-buffer-trylock-rename
+++ a/fs/jbd2/commit.c
@@ -208,7 +208,7 @@ write_out_data:
* blocking lock_buffer().
*/
if (buffer_dirty(bh)) {
- if (test_set_buffer_locked(bh)) {
+ if (!trylock_buffer(bh)) {
BUFFER_TRACE(bh, "needs blocking lock");
spin_unlock(&journal->j_list_lock);
/* Write out all data to prevent deadlocks */
diff -puN fs/ntfs/aops.c~fs-buffer-trylock-rename fs/ntfs/aops.c
--- a/fs/ntfs/aops.c~fs-buffer-trylock-rename
+++ a/fs/ntfs/aops.c
@@ -1194,7 +1194,7 @@ lock_retry_remap:
tbh = bhs[i];
if (!tbh)
continue;
- if (unlikely(test_set_buffer_locked(tbh)))
+ if (!trylock_buffer(tbh))
BUG();
/* The buffer dirty state is now irrelevant, just clean it. */
clear_buffer_dirty(tbh);
diff -puN fs/ntfs/compress.c~fs-buffer-trylock-rename fs/ntfs/compress.c
--- a/fs/ntfs/compress.c~fs-buffer-trylock-rename
+++ a/fs/ntfs/compress.c
@@ -665,7 +665,7 @@ lock_retry_remap:
for (i = 0; i < nr_bhs; i++) {
struct buffer_head *tbh = bhs[i];
- if (unlikely(test_set_buffer_locked(tbh)))
+ if (!trylock_buffer(tbh))
continue;
if (unlikely(buffer_uptodate(tbh))) {
unlock_buffer(tbh);
diff -puN fs/ntfs/mft.c~fs-buffer-trylock-rename fs/ntfs/mft.c
--- a/fs/ntfs/mft.c~fs-buffer-trylock-rename
+++ a/fs/ntfs/mft.c
@@ -586,7 +586,7 @@ int ntfs_sync_mft_mirror(ntfs_volume *vo
for (i_bhs = 0; i_bhs < nr_bhs; i_bhs++) {
struct buffer_head *tbh = bhs[i_bhs];
- if (unlikely(test_set_buffer_locked(tbh)))
+ if (!trylock_buffer(tbh))
BUG();
BUG_ON(!buffer_uptodate(tbh));
clear_buffer_dirty(tbh);
@@ -779,7 +779,7 @@ int write_mft_record_nolock(ntfs_inode *
for (i_bhs = 0; i_bhs < nr_bhs; i_bhs++) {
struct buffer_head *tbh = bhs[i_bhs];
- if (unlikely(test_set_buffer_locked(tbh)))
+ if (!trylock_buffer(tbh))
BUG();
BUG_ON(!buffer_uptodate(tbh));
clear_buffer_dirty(tbh);
diff -puN fs/reiserfs/inode.c~fs-buffer-trylock-rename fs/reiserfs/inode.c
--- a/fs/reiserfs/inode.c~fs-buffer-trylock-rename
+++ a/fs/reiserfs/inode.c
@@ -2433,7 +2433,7 @@ static int reiserfs_write_full_page(stru
if (wbc->sync_mode != WB_SYNC_NONE || !wbc->nonblocking) {
lock_buffer(bh);
} else {
- if (test_set_buffer_locked(bh)) {
+ if (!trylock_buffer(bh)) {
redirty_page_for_writepage(wbc, page);
continue;
}
diff -puN fs/reiserfs/journal.c~fs-buffer-trylock-rename fs/reiserfs/journal.c
--- a/fs/reiserfs/journal.c~fs-buffer-trylock-rename
+++ a/fs/reiserfs/journal.c
@@ -857,7 +857,7 @@ static int write_ordered_buffers(spinloc
jh = JH_ENTRY(list->next);
bh = jh->bh;
get_bh(bh);
- if (test_set_buffer_locked(bh)) {
+ if (!trylock_buffer(bh)) {
if (!buffer_dirty(bh)) {
list_move(&jh->list, &tmp);
goto loop_next;
@@ -3877,7 +3877,7 @@ int reiserfs_prepare_for_journal(struct
{
PROC_INFO_INC(p_s_sb, journal.prepare);
- if (test_set_buffer_locked(bh)) {
+ if (!trylock_buffer(bh)) {
if (!wait)
return 0;
lock_buffer(bh);
diff -puN include/linux/buffer_head.h~fs-buffer-trylock-rename include/linux/buffer_head.h
--- a/include/linux/buffer_head.h~fs-buffer-trylock-rename
+++ a/include/linux/buffer_head.h
@@ -115,7 +115,6 @@ BUFFER_FNS(Uptodate, uptodate)
BUFFER_FNS(Dirty, dirty)
TAS_BUFFER_FNS(Dirty, dirty)
BUFFER_FNS(Lock, locked)
-TAS_BUFFER_FNS(Lock, locked)
BUFFER_FNS(Req, req)
TAS_BUFFER_FNS(Req, req)
BUFFER_FNS(Mapped, mapped)
@@ -318,10 +317,15 @@ static inline void wait_on_buffer(struct
__wait_on_buffer(bh);
}
+static inline int trylock_buffer(struct buffer_head *bh)
+{
+ return likely(!test_and_set_bit(BH_Lock, &bh->b_state));
+}
+
static inline void lock_buffer(struct buffer_head *bh)
{
might_sleep();
- if (test_set_buffer_locked(bh))
+ if (!trylock_buffer(bh))
__lock_buffer(bh);
}
_
Patches currently in -mm which might be from npiggin@xxxxxxx are
nfs-use-gfp_nofs-preloads-for-radix-tree-insertion.patch
rd-fix-data-corruption-on-memory-pressure.patch
slub-use-non-atomic-bit-unlock.patch
radix-tree-avoid-atomic-allocations-for-preloaded-insertions.patch
fs-buffer-trylock-rename.patch
fs-introduce-write_begin-write_end-and-perform_write-aops-revoke.patch
fs-introduce-write_begin-write_end-and-perform_write-aops-revoke-fix.patch
reiser4.patch
-
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