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OpenCloudOS-Kernel
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Merge tag 'for_linus-20110831' of git://github.com/tytso/ext4 

* tag 'for_linus-20110831' of git://github.com/tytso/ext4:
  ext4: remove i_mutex lock in ext4_evict_inode to fix lockdep complaining
This commit is contained in:
Linus Torvalds 2011-08-31 15:08:19 -07:00
parent fd53f7d8ee 8c0bec2151
commit b79c4f75e4
3 changed files with 18 additions and 4 deletions
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1
fs/ext4/ext4.h
View File

@ -175,6 +175,7 @@ struct mpage_da_data {
*/
#define EXT4_IO_END_UNWRITTEN 0x0001
#define EXT4_IO_END_ERROR 0x0002
#define EXT4_IO_END_QUEUED 0x0004
struct ext4_io_page {
struct page *p_page;

3
fs/ext4/inode.c
View File

@ -121,9 +121,6 @@ void ext4_evict_inode(struct inode *inode)
trace_ext4_evict_inode(inode);
mutex_lock(&inode->i_mutex);
ext4_flush_completed_IO(inode);
mutex_unlock(&inode->i_mutex);
ext4_ioend_wait(inode);
if (inode->i_nlink) {

18
fs/ext4/page-io.c
View File

@ -142,7 +142,23 @@ static void ext4_end_io_work(struct work_struct *work)
unsigned long flags;
int ret;
mutex_lock(&inode->i_mutex);
if (!mutex_trylock(&inode->i_mutex)) {
/*
* Requeue the work instead of waiting so that the work
* items queued after this can be processed.
*/
queue_work(EXT4_SB(inode->i_sb)->dio_unwritten_wq, &io->work);
/*
* To prevent the ext4-dio-unwritten thread from keeping
* requeueing end_io requests and occupying cpu for too long,
* yield the cpu if it sees an end_io request that has already
* been requeued.
*/
if (io->flag & EXT4_IO_END_QUEUED)
yield();
io->flag |= EXT4_IO_END_QUEUED;
return;
}
ret = ext4_end_io_nolock(io);
if (ret < 0) {
mutex_unlock(&inode->i_mutex);