From: Christoph Hellwig <hch@lst.de>
To: shaggy@austin.ibm.com
Cc: linux-kernel@vger.kernel.org
Subject: [PATCH] jfs: use kthread_ API
Date: Tue, 14 Feb 2006 18:55:45 +0100 [thread overview]
Message-ID: <20060214175545.GA19225@lst.de> (raw)
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>
Index: linux-2.6/fs/jfs/jfs_logmgr.c
===================================================================
--- linux-2.6.orig/fs/jfs/jfs_logmgr.c 2005-12-27 18:30:32.000000000 +0100
+++ linux-2.6/fs/jfs/jfs_logmgr.c 2006-02-14 16:24:18.000000000 +0100
@@ -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 @@
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 @@
{
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 @@
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;
}
/*
Index: linux-2.6/fs/jfs/jfs_superblock.h
===================================================================
--- linux-2.6.orig/fs/jfs/jfs_superblock.h 2005-12-27 18:30:32.000000000 +0100
+++ linux-2.6/fs/jfs/jfs_superblock.h 2006-02-14 16:24:18.000000000 +0100
@@ -113,12 +113,9 @@
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 */
Index: linux-2.6/fs/jfs/jfs_txnmgr.c
===================================================================
--- linux-2.6.orig/fs/jfs/jfs_txnmgr.c 2006-01-10 13:46:05.000000000 +0100
+++ linux-2.6/fs/jfs/jfs_txnmgr.c 2006-02-14 16:24:18.000000000 +0100
@@ -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 @@
#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 @@
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 @@
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 @@
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 rc;
tid_t tid;
- daemonize("jfsSync");
-
- complete(&jfsIOwait);
-
do {
/*
* write each inode on the anonymous inode list
@@ -2996,19 +2988,15 @@
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)
Index: linux-2.6/fs/jfs/super.c
===================================================================
--- linux-2.6.orig/fs/jfs/super.c 2006-01-10 13:46:05.000000000 +0100
+++ linux-2.6/fs/jfs/super.c 2006-02-14 16:24:18.000000000 +0100
@@ -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 @@
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 @@
/*
* 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 @@
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 @@
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 @@
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
next reply other threads:[~2006-02-14 17:55 UTC|newest]
Thread overview: 2+ messages / expand[flat|nested] mbox.gz Atom feed top
2006-02-14 17:55 Christoph Hellwig [this message]
2006-02-14 18:35 ` [PATCH] jfs: use kthread_ API Dave Kleikamp
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=20060214175545.GA19225@lst.de \
--to=hch@lst.de \
--cc=linux-kernel@vger.kernel.org \
--cc=shaggy@austin.ibm.com \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is an external index of several public inboxes,
see mirroring instructions on how to clone and mirror
all data and code used by this external index.