From: Linh Dang <linhd@nortelnetworks.com>
To: linux-mtd@lists.infradead.org
Subject: Re: Bottom halves being disabled
Date: Tue, 24 Aug 2004 22:36:28 -0400 [thread overview]
Message-ID: <wn5n00kgd03.fsf@linhd-2.ca.nortel.com> (raw)
In-Reply-To: <1093350246.14552.12435.camel@hades.cambridge.redhat.com> (David Woodhouse's message of "Tue, 24 Aug 2004 13:24:06 +0100")
David Woodhouse <dwmw2@infradead.org> wrote:
> On Tue, 2004-08-24 at 05:09 -0700, Ed Co wrote:
>> Hi All,
>>
>> In the NOR driver code, the spin locks are acquired
>> everywhere with bottom halves disabled using the
>> spin_lock_bh() API. My doubt is why are the bottom
>> halves disabled? (Doesn't that add to the real time
>> latency on the system!)
>>
>> Hoping someone would clear the doubt
>
> Because we intend the erase completion to be asynchronous, hence we
> lock against the timers which may one day check for it. There's no
> real reason we couldn't switch to spin_lock() for now.
Is it safe to convert those spin_locks to mutexes?
--
Linh Dang
next prev parent reply other threads:[~2004-08-25 2:36 UTC|newest]
Thread overview: 9+ messages / expand[flat|nested] mbox.gz Atom feed top
2004-08-24 12:09 Bottom halves being disabled Ed Co
2004-08-24 12:24 ` David Woodhouse
2004-08-25 2:36 ` Linh Dang [this message]
2004-08-25 9:38 ` David Woodhouse
2004-08-25 10:48 ` Linh Dang
2004-08-25 10:53 ` David Woodhouse
2004-08-25 12:46 ` Linh Dang
2004-09-09 18:12 ` Hi Latency in do_read_onechip (was Re: Bottom halves being disabled) Linh Dang
2004-08-24 12:28 ` Bottom halves being disabled Josh Boyer
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