mirror of
https://github.com/edk2-porting/linux-next.git
synced 2024-11-19 08:05:27 +08:00
JFS: Use the kthread_ API
Use the kthread_ API instead of opencoding lots of hairy code for kernel thread creation and teardown. Signed-off-by: Christoph Hellwig <hch@lst.de> Signed-off-by: Dave Kleikamp <shaggy@austin.ibm.com>
This commit is contained in:
Christoph Hellwig
Dave Kleikamp
parent
4837c672fd
commit
91dbb4deb3
@ -64,6 +64,7 @@
|
||||
#include <linux/interrupt.h>
|
||||
#include <linux/smp_lock.h>
|
||||
#include <linux/completion.h>
|
||||
#include <linux/kthread.h>
|
||||
#include <linux/buffer_head.h> /* for sync_blockdev() */
|
||||
#include <linux/bio.h>
|
||||
#include <linux/suspend.h>
|
||||
@ -81,7 +82,6 @@
|
||||
*/
|
||||
static struct lbuf *log_redrive_list;
|
||||
static DEFINE_SPINLOCK(log_redrive_lock);
|
||||
DECLARE_WAIT_QUEUE_HEAD(jfs_IO_thread_wait);
|
||||
|
||||
|
||||
/*
|
||||
@ -1980,7 +1980,7 @@ static inline void lbmRedrive(struct lbuf *bp)
|
||||
log_redrive_list = bp;
|
||||
spin_unlock_irqrestore(&log_redrive_lock, flags);
|
||||
|
||||
wake_up(&jfs_IO_thread_wait);
|
||||
wake_up_process(jfsIOthread);
|
||||
}
|
||||
|
||||
|
||||
@ -2347,13 +2347,7 @@ int jfsIOWait(void *arg)
|
||||
{
|
||||
struct lbuf *bp;
|
||||
|
||||
daemonize("jfsIO");
|
||||
|
||||
complete(&jfsIOwait);
|
||||
|
||||
do {
|
||||
DECLARE_WAITQUEUE(wq, current);
|
||||
|
||||
spin_lock_irq(&log_redrive_lock);
|
||||
while ((bp = log_redrive_list) != 0) {
|
||||
log_redrive_list = bp->l_redrive_next;
|
||||
@ -2362,21 +2356,19 @@ int jfsIOWait(void *arg)
|
||||
lbmStartIO(bp);
|
||||
spin_lock_irq(&log_redrive_lock);
|
||||
}
|
||||
spin_unlock_irq(&log_redrive_lock);
|
||||
|
||||
if (freezing(current)) {
|
||||
spin_unlock_irq(&log_redrive_lock);
|
||||
refrigerator();
|
||||
} else {
|
||||
add_wait_queue(&jfs_IO_thread_wait, &wq);
|
||||
set_current_state(TASK_INTERRUPTIBLE);
|
||||
spin_unlock_irq(&log_redrive_lock);
|
||||
schedule();
|
||||
current->state = TASK_RUNNING;
|
||||
remove_wait_queue(&jfs_IO_thread_wait, &wq);
|
||||
}
|
||||
} while (!jfs_stop_threads);
|
||||
} while (!kthread_should_stop());
|
||||
|
||||
jfs_info("jfsIOWait being killed!");
|
||||
complete_and_exit(&jfsIOwait, 0);
|
||||
return 0;
|
||||
}
|
||||
|
||||
/*
|
||||
|
||||
@ -113,12 +113,9 @@ extern int jfs_mount(struct super_block *);
|
||||
extern int jfs_mount_rw(struct super_block *, int);
|
||||
extern int jfs_umount(struct super_block *);
|
||||
extern int jfs_umount_rw(struct super_block *);
|
||||
|
||||
extern int jfs_stop_threads;
|
||||
extern struct completion jfsIOwait;
|
||||
extern wait_queue_head_t jfs_IO_thread_wait;
|
||||
extern wait_queue_head_t jfs_commit_thread_wait;
|
||||
extern wait_queue_head_t jfs_sync_thread_wait;
|
||||
extern int jfs_extendfs(struct super_block *, s64, int);
|
||||
|
||||
extern struct task_struct *jfsIOthread;
|
||||
extern struct task_struct *jfsSyncThread;
|
||||
|
||||
#endif /*_H_JFS_SUPERBLOCK */
|
||||
|
||||
@ -49,6 +49,7 @@
|
||||
#include <linux/suspend.h>
|
||||
#include <linux/module.h>
|
||||
#include <linux/moduleparam.h>
|
||||
#include <linux/kthread.h>
|
||||
#include "jfs_incore.h"
|
||||
#include "jfs_inode.h"
|
||||
#include "jfs_filsys.h"
|
||||
@ -121,8 +122,7 @@ static DEFINE_SPINLOCK(jfsTxnLock);
|
||||
#define LAZY_LOCK(flags) spin_lock_irqsave(&TxAnchor.LazyLock, flags)
|
||||
#define LAZY_UNLOCK(flags) spin_unlock_irqrestore(&TxAnchor.LazyLock, flags)
|
||||
|
||||
DECLARE_WAIT_QUEUE_HEAD(jfs_sync_thread_wait);
|
||||
DECLARE_WAIT_QUEUE_HEAD(jfs_commit_thread_wait);
|
||||
static DECLARE_WAIT_QUEUE_HEAD(jfs_commit_thread_wait);
|
||||
static int jfs_commit_thread_waking;
|
||||
|
||||
/*
|
||||
@ -207,7 +207,7 @@ static lid_t txLockAlloc(void)
|
||||
if ((++TxAnchor.tlocksInUse > TxLockHWM) && (jfs_tlocks_low == 0)) {
|
||||
jfs_info("txLockAlloc tlocks low");
|
||||
jfs_tlocks_low = 1;
|
||||
wake_up(&jfs_sync_thread_wait);
|
||||
wake_up_process(jfsSyncThread);
|
||||
}
|
||||
|
||||
return lid;
|
||||
@ -2743,10 +2743,6 @@ int jfs_lazycommit(void *arg)
|
||||
unsigned long flags;
|
||||
struct jfs_sb_info *sbi;
|
||||
|
||||
daemonize("jfsCommit");
|
||||
|
||||
complete(&jfsIOwait);
|
||||
|
||||
do {
|
||||
LAZY_LOCK(flags);
|
||||
jfs_commit_thread_waking = 0; /* OK to wake another thread */
|
||||
@ -2806,13 +2802,13 @@ int jfs_lazycommit(void *arg)
|
||||
current->state = TASK_RUNNING;
|
||||
remove_wait_queue(&jfs_commit_thread_wait, &wq);
|
||||
}
|
||||
} while (!jfs_stop_threads);
|
||||
} while (!kthread_should_stop());
|
||||
|
||||
if (!list_empty(&TxAnchor.unlock_queue))
|
||||
jfs_err("jfs_lazycommit being killed w/pending transactions!");
|
||||
else
|
||||
jfs_info("jfs_lazycommit being killed\n");
|
||||
complete_and_exit(&jfsIOwait, 0);
|
||||
return 0;
|
||||
}
|
||||
|
||||
void txLazyUnlock(struct tblock * tblk)
|
||||
@ -2932,10 +2928,6 @@ int jfs_sync(void *arg)
|
||||
int rc;
|
||||
tid_t tid;
|
||||
|
||||
daemonize("jfsSync");
|
||||
|
||||
complete(&jfsIOwait);
|
||||
|
||||
do {
|
||||
/*
|
||||
* write each inode on the anonymous inode list
|
||||
@ -2996,19 +2988,15 @@ int jfs_sync(void *arg)
|
||||
TXN_UNLOCK();
|
||||
refrigerator();
|
||||
} else {
|
||||
DECLARE_WAITQUEUE(wq, current);
|
||||
|
||||
add_wait_queue(&jfs_sync_thread_wait, &wq);
|
||||
set_current_state(TASK_INTERRUPTIBLE);
|
||||
TXN_UNLOCK();
|
||||
schedule();
|
||||
current->state = TASK_RUNNING;
|
||||
remove_wait_queue(&jfs_sync_thread_wait, &wq);
|
||||
}
|
||||
} while (!jfs_stop_threads);
|
||||
} while (!kthread_should_stop());
|
||||
|
||||
jfs_info("jfs_sync being killed");
|
||||
complete_and_exit(&jfsIOwait, 0);
|
||||
return 0;
|
||||
}
|
||||
|
||||
#if defined(CONFIG_PROC_FS) && defined(CONFIG_JFS_DEBUG)
|
||||
|
||||
@ -25,6 +25,7 @@
|
||||
#include <linux/vfs.h>
|
||||
#include <linux/mount.h>
|
||||
#include <linux/moduleparam.h>
|
||||
#include <linux/kthread.h>
|
||||
#include <linux/posix_acl.h>
|
||||
#include <asm/uaccess.h>
|
||||
#include <linux/seq_file.h>
|
||||
@ -54,11 +55,9 @@ static int commit_threads = 0;
|
||||
module_param(commit_threads, int, 0);
|
||||
MODULE_PARM_DESC(commit_threads, "Number of commit threads");
|
||||
|
||||
int jfs_stop_threads;
|
||||
static pid_t jfsIOthread;
|
||||
static pid_t jfsCommitThread[MAX_COMMIT_THREADS];
|
||||
static pid_t jfsSyncThread;
|
||||
DECLARE_COMPLETION(jfsIOwait);
|
||||
static struct task_struct *jfsCommitThread[MAX_COMMIT_THREADS];
|
||||
struct task_struct *jfsIOthread;
|
||||
struct task_struct *jfsSyncThread;
|
||||
|
||||
#ifdef CONFIG_JFS_DEBUG
|
||||
int jfsloglevel = JFS_LOGLEVEL_WARN;
|
||||
@ -661,12 +660,12 @@ static int __init init_jfs_fs(void)
|
||||
/*
|
||||
* I/O completion thread (endio)
|
||||
*/
|
||||
jfsIOthread = kernel_thread(jfsIOWait, NULL, CLONE_KERNEL);
|
||||
if (jfsIOthread < 0) {
|
||||
jfs_err("init_jfs_fs: fork failed w/rc = %d", jfsIOthread);
|
||||
jfsIOthread = kthread_run(jfsIOWait, NULL, "jfsIO");
|
||||
if (IS_ERR(jfsIOthread)) {
|
||||
rc = PTR_ERR(jfsIOthread);
|
||||
jfs_err("init_jfs_fs: fork failed w/rc = %d", rc);
|
||||
goto end_txmngr;
|
||||
}
|
||||
wait_for_completion(&jfsIOwait); /* Wait until thread starts */
|
||||
|
||||
if (commit_threads < 1)
|
||||
commit_threads = num_online_cpus();
|
||||
@ -674,24 +673,21 @@ static int __init init_jfs_fs(void)
|
||||
commit_threads = MAX_COMMIT_THREADS;
|
||||
|
||||
for (i = 0; i < commit_threads; i++) {
|
||||
jfsCommitThread[i] = kernel_thread(jfs_lazycommit, NULL,
|
||||
CLONE_KERNEL);
|
||||
if (jfsCommitThread[i] < 0) {
|
||||
jfs_err("init_jfs_fs: fork failed w/rc = %d",
|
||||
jfsCommitThread[i]);
|
||||
jfsCommitThread[i] = kthread_run(jfs_lazycommit, NULL, "jfsCommit");
|
||||
if (IS_ERR(jfsCommitThread[i])) {
|
||||
rc = PTR_ERR(jfsCommitThread[i]);
|
||||
jfs_err("init_jfs_fs: fork failed w/rc = %d", rc);
|
||||
commit_threads = i;
|
||||
goto kill_committask;
|
||||
}
|
||||
/* Wait until thread starts */
|
||||
wait_for_completion(&jfsIOwait);
|
||||
}
|
||||
|
||||
jfsSyncThread = kernel_thread(jfs_sync, NULL, CLONE_KERNEL);
|
||||
if (jfsSyncThread < 0) {
|
||||
jfs_err("init_jfs_fs: fork failed w/rc = %d", jfsSyncThread);
|
||||
jfsSyncThread = kthread_run(jfs_sync, NULL, "jfsSync");
|
||||
if (IS_ERR(jfsSyncThread)) {
|
||||
rc = PTR_ERR(jfsSyncThread);
|
||||
jfs_err("init_jfs_fs: fork failed w/rc = %d", rc);
|
||||
goto kill_committask;
|
||||
}
|
||||
wait_for_completion(&jfsIOwait); /* Wait until thread starts */
|
||||
|
||||
#ifdef PROC_FS_JFS
|
||||
jfs_proc_init();
|
||||
@ -700,13 +696,9 @@ static int __init init_jfs_fs(void)
|
||||
return register_filesystem(&jfs_fs_type);
|
||||
|
||||
kill_committask:
|
||||
jfs_stop_threads = 1;
|
||||
wake_up_all(&jfs_commit_thread_wait);
|
||||
for (i = 0; i < commit_threads; i++)
|
||||
wait_for_completion(&jfsIOwait);
|
||||
|
||||
wake_up(&jfs_IO_thread_wait);
|
||||
wait_for_completion(&jfsIOwait); /* Wait for thread exit */
|
||||
kthread_stop(jfsCommitThread[i]);
|
||||
kthread_stop(jfsIOthread);
|
||||
end_txmngr:
|
||||
txExit();
|
||||
free_metapage:
|
||||
@ -722,16 +714,13 @@ static void __exit exit_jfs_fs(void)
|
||||
|
||||
jfs_info("exit_jfs_fs called");
|
||||
|
||||
jfs_stop_threads = 1;
|
||||
txExit();
|
||||
metapage_exit();
|
||||
wake_up(&jfs_IO_thread_wait);
|
||||
wait_for_completion(&jfsIOwait); /* Wait until IO thread exits */
|
||||
wake_up_all(&jfs_commit_thread_wait);
|
||||
|
||||
kthread_stop(jfsIOthread);
|
||||
for (i = 0; i < commit_threads; i++)
|
||||
wait_for_completion(&jfsIOwait);
|
||||
wake_up(&jfs_sync_thread_wait);
|
||||
wait_for_completion(&jfsIOwait); /* Wait until Sync thread exits */
|
||||
kthread_stop(jfsCommitThread[i]);
|
||||
kthread_stop(jfsSyncThread);
|
||||
#ifdef PROC_FS_JFS
|
||||
jfs_proc_clean();
|
||||
#endif
|
||||
|
||||
Loading…
Reference in New Issue
Block a user