From: "Srinivas Ganji" <srinivasganji.linux@gmail.com>
To: linux-kernel@vger.kernel.org
Subject: Spinlock Related Debug Messages in Block Driver
Date: Tue, 11 Jul 2006 11:33:54 +0530 [thread overview]
Message-ID: <4dccc9070607102303v380281adp3943e1d58fad8d0@mail.gmail.com> (raw)
Dear All,
I implemented the sample block driver for the removable devices and
the code contains no statements related to the spin lock except a lock
to the blk_init_queue API as shown below.
spinlock_t qlock;
gDisk->blkqueue = blk_init_queue(do_my_request, &gDisk->qlock);
The kernel version is 2.6.10.
Everything works fine but when I try to copy a file of huge size
(about 100MB), the following debug messages are getting displayed on
the console:
Fc3: drivers/block/ll_rw_blk.c: 2351: spin_lock already locked by the drivers.
Fc3: drivers/block/ll_rw_blk.c: 2468: spin_unlock not locked by the drivers.
In spite of these debug messages; the file is getting copied successfully.
I studied the Block driver 16th chapter in LDD third edition.
Can any one provide a pointer to these debug messages. Do I need to
implement any patches for the kernel.
Regards,
Srinivas G.
next reply other threads:[~2006-07-11 6:03 UTC|newest]
Thread overview: 4+ messages / expand[flat|nested] mbox.gz Atom feed top
2006-07-11 6:03 Srinivas Ganji [this message]
2006-07-11 7:17 ` Jens Axboe
2006-07-11 7:42 ` Srinivas Ganji
2006-07-11 7:46 ` Jens Axboe
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