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Btrfs: Give all the worker threads descriptive names 

Signed-off-by: Chris Mason <chris.mason@oracle.com>
This commit is contained in:
Chris Mason 2008-08-15 15:34:16 -04:00
parent 777e6bd706
commit 5443be45f5
3 changed files with 24 additions and 10 deletions
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7
fs/btrfs/async-thread.c
View File

@ -153,7 +153,7 @@ int btrfs_stop_workers(struct btrfs_workers *workers)
/*
* simple init on struct btrfs_workers
*/
void btrfs_init_workers(struct btrfs_workers *workers, int max)
void btrfs_init_workers(struct btrfs_workers *workers, char *name, int max)
{
workers->num_workers = 0;
INIT_LIST_HEAD(&workers->worker_list);
@ -161,6 +161,7 @@ void btrfs_init_workers(struct btrfs_workers *workers, int max)
spin_lock_init(&workers->lock);
workers->max_workers = max;
workers->idle_thresh = 32;
workers->name = name;
}
/*
@ -184,7 +185,9 @@ int btrfs_start_workers(struct btrfs_workers *workers, int num_workers)
INIT_LIST_HEAD(&worker->worker_list);
spin_lock_init(&worker->lock);
atomic_set(&worker->num_pending, 0);
worker->task = kthread_run(worker_loop, worker, "btrfs");
worker->task = kthread_run(worker_loop, worker,
"btrfs-%s-%d", workers->name,
workers->num_workers + i);
worker->workers = workers;
if (IS_ERR(worker->task)) {
kfree(worker);

5
fs/btrfs/async-thread.h
View File

@ -69,11 +69,14 @@ struct btrfs_workers {
/* lock for finding the next worker thread to queue on */
spinlock_t lock;
/* extra name for this worker */
char *name;
};
int btrfs_queue_worker(struct btrfs_workers *workers, struct btrfs_work *work);
int btrfs_start_workers(struct btrfs_workers *workers, int num_workers);
int btrfs_stop_workers(struct btrfs_workers *workers);
void btrfs_init_workers(struct btrfs_workers *workers, int max);
void btrfs_init_workers(struct btrfs_workers *workers, char *name, int max);
int btrfs_requeue_work(struct btrfs_work *work);
#endif

22
fs/btrfs/disk-io.c
View File

@ -492,11 +492,11 @@ static int __btree_submit_bio_hook(struct inode *inode, int rw, struct bio *bio,
/*
* when we're called for a write, we're already in the async
* submission context. Just jump ingo btrfs_map_bio
* submission context. Just jump into btrfs_map_bio
*/
if (rw & (1 << BIO_RW)) {
return btrfs_map_bio(BTRFS_I(inode)->root, rw, bio,
mirror_num, 0);
mirror_num, 1);
}
/*
@ -528,6 +528,12 @@ static int btree_writepage(struct page *page, struct writeback_control *wbc)
{
struct extent_io_tree *tree;
tree = &BTRFS_I(page->mapping->host)->io_tree;
if (current->flags & PF_MEMALLOC) {
redirty_page_for_writepage(wbc, page);
unlock_page(page);
return 0;
}
return extent_write_full_page(tree, page, btree_get_extent, wbc);
}
@ -1363,8 +1369,9 @@ struct btrfs_root *open_ctree(struct super_block *sb,
* queue work function gets called at interrupt time, and so it
* cannot dynamically grow.
*/
btrfs_init_workers(&fs_info->workers, fs_info->thread_pool_size);
btrfs_init_workers(&fs_info->submit_workers,
btrfs_init_workers(&fs_info->workers, "worker",
fs_info->thread_pool_size);
btrfs_init_workers(&fs_info->submit_workers, "submit",
min_t(u64, fs_devices->num_devices,
fs_info->thread_pool_size));
@ -1374,9 +1381,10 @@ struct btrfs_root *open_ctree(struct super_block *sb,
*/
fs_info->submit_workers.idle_thresh = 64;
btrfs_init_workers(&fs_info->fixup_workers, 1);
btrfs_init_workers(&fs_info->endio_workers, fs_info->thread_pool_size);
btrfs_init_workers(&fs_info->endio_write_workers,
btrfs_init_workers(&fs_info->fixup_workers, "fixup", 1);
btrfs_init_workers(&fs_info->endio_workers, "endio",
fs_info->thread_pool_size);
btrfs_init_workers(&fs_info->endio_write_workers, "endio-write",
fs_info->thread_pool_size);
/*