linux-kernel - [PATCH] increment nr_tasks in io_context when CLONE

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Message-Id: <1208231425.27984.9.camel@zero100.blr.novell.com>
Date:	Tue, 15 Apr 2008 03:50:25 +0000
From:	Nikanth Karthikesan <knikanth@...e.de>
To:	Jens Axboe <jens.axboe@...cle.com>
Cc:	Linux Kernel Mailing List <linux-kernel@...r.kernel.org>
Subject: [PATCH] increment nr_tasks in io_context when CLONE_IO is set

Increment the nr_tasks associated with the io_context when CLONE_IO flag
is set.

Signed-off-by: Nikanth Karthikesan <knikanth@...e.de>

--
diff --git a/kernel/fork.c b/kernel/fork.c
index dd249c3..01e843b 100644
--- a/kernel/fork.c
+++ b/kernel/fork.c
@@ -812,6 +812,7 @@ static int copy_io(unsigned long clone_f
 		tsk->io_context = ioc_task_link(ioc);
 		if (unlikely(!tsk->io_context))
 			return -ENOMEM;
+		atomic_inc(&tsk->io_context->nr_tasks);
 	} else if (ioprio_valid(ioc->ioprio)) {
 		tsk->io_context = alloc_io_context(GFP_KERNEL, -1);
 		if (unlikely(!tsk->io_context))


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