block: Fix io_context leak after clone with CLONE_IO

With CLONE_IO, copy_io() increments both ioc->refcount and ioc->nr_tasks. However exit_io_context() only decrements ioc->refcount if ioc->nr_tasks reaches 0. Always call put_io_context() in exit_io_context(). Signed-off-by: Louis Rilling <louis.rilling@kerlabs.com> Signed-off-by: Jens Axboe <jens.axboe@oracle.com>

block: Fix io_context leak after clone with CLONE_IO
With CLONE_IO, copy_io() increments both ioc->refcount and ioc->nr_tasks. However exit_io_context() only decrements ioc->refcount if ioc->nr_tasks reaches 0. Always call put_io_context() in exit_io_context(). Signed-off-by: Louis Rilling <louis.rilling@kerlabs.com> Signed-off-by: Jens Axboe <jens.axboe@oracle.com>
Louis Rilling · Jens Axboe
1 parent 3c764b7a65
Showing 1 changed file with 1 additions and 1 deletions Side-by-side Diff
block/blk-ioc.c
@@ -80,8 +80,8 @@
 			ioc->aic->exit(ioc->aic);
 		cfq_exit(ioc);
  
-		put_io_context(ioc);
 	}
+	put_io_context(ioc);
 }
  
 struct io_context *alloc_io_context(gfp_t gfp_flags, int node)
...	...	@@ -80,8 +80,8 @@
80	80	ioc->aic->exit(ioc->aic);
81	81	cfq_exit(ioc);
82	82
83		- put_io_context(ioc);
84	83	}
	84	+ put_io_context(ioc);
85	85	}
86	86
87	87	struct io_context *alloc_io_context(gfp_t gfp_flags, int node)