From: Miklos Szeredi <[email protected]>
Use wake_up_all instead of wake_up in put_reserved_req(), otherwise it
is possible that the right task is not woken up.
Also create a separate reserved_req_waitq in addition to the
blocked_waitq, since they fulfill totally separate functions.
Signed-off-by: Miklos Szeredi <[email protected]>
---
Index: linux/fs/fuse/dev.c
===================================================================
--- linux.orig/fs/fuse/dev.c 2007-08-03 17:54:53.000000000 +0200
+++ linux/fs/fuse/dev.c 2007-08-03 17:54:54.000000000 +0200
@@ -129,7 +129,7 @@ static struct fuse_req *get_reserved_req
struct fuse_file *ff = file->private_data;
do {
- wait_event(fc->blocked_waitq, ff->reserved_req);
+ wait_event(fc->reserved_req_waitq, ff->reserved_req);
spin_lock(&fc->lock);
if (ff->reserved_req) {
req = ff->reserved_req;
@@ -155,7 +155,7 @@ static void put_reserved_req(struct fuse
fuse_request_init(req);
BUG_ON(ff->reserved_req);
ff->reserved_req = req;
- wake_up(&fc->blocked_waitq);
+ wake_up_all(&fc->reserved_req_waitq);
spin_unlock(&fc->lock);
fput(file);
}
Index: linux/fs/fuse/fuse_i.h
===================================================================
--- linux.orig/fs/fuse/fuse_i.h 2007-08-03 17:54:53.000000000 +0200
+++ linux/fs/fuse/fuse_i.h 2007-08-03 17:54:54.000000000 +0200
@@ -289,6 +289,9 @@ struct fuse_conn {
/** waitq for blocked connection */
wait_queue_head_t blocked_waitq;
+ /** waitq for reserved requests */
+ wait_queue_head_t reserved_req_waitq;
+
/** The next unique request id */
u64 reqctr;
Index: linux/fs/fuse/inode.c
===================================================================
--- linux.orig/fs/fuse/inode.c 2007-08-03 17:54:50.000000000 +0200
+++ linux/fs/fuse/inode.c 2007-08-03 17:54:54.000000000 +0200
@@ -232,6 +232,7 @@ static void fuse_put_super(struct super_
kill_fasync(&fc->fasync, SIGIO, POLL_IN);
wake_up_all(&fc->waitq);
wake_up_all(&fc->blocked_waitq);
+ wake_up_all(&fc->reserved_req_waitq);
mutex_lock(&fuse_mutex);
list_del(&fc->entry);
fuse_ctl_remove_conn(fc);
@@ -426,6 +427,7 @@ static struct fuse_conn *new_conn(void)
atomic_set(&fc->count, 1);
init_waitqueue_head(&fc->waitq);
init_waitqueue_head(&fc->blocked_waitq);
+ init_waitqueue_head(&fc->reserved_req_waitq);
INIT_LIST_HEAD(&fc->pending);
INIT_LIST_HEAD(&fc->processing);
INIT_LIST_HEAD(&fc->io);
--
-
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