From: Maxim Levitsky <maximlevitsky@gmail.com>
To: Peter Zijlstra <peterz@infradead.org>
Cc: David Woodhouse <dwmw2@infradead.org>,
Artem Bityutskiy <dedekind1@gmail.com>,
linux-mtd <linux-mtd@lists.infradead.org>,
linux-kernel <linux-kernel@vger.kernel.org>,
Alex Dubov <oakad@yahoo.com>, joern <joern@logfs.org>,
Thomas Gleixner <tglx@linutronix.de>,
"stanley.miao" <stanley.miao@windriver.com>,
Vitaly Wool <vitalywool@gmail.com>
Subject: Re: [PATCH 01/17] MTD: create lockless versions of {get,put}_mtd_device This will be used to resolve deadlock in block translation layer.
Date: Wed, 10 Feb 2010 23:22:33 +0200 [thread overview]
Message-ID: <1265836953.8276.9.camel@maxim-laptop> (raw)
In-Reply-To: <1265737574.9195.16.camel@maxim-laptop>
On Tue, 2010-02-09 at 19:46 +0200, Maxim Levitsky wrote:
> On Tue, 2010-02-09 at 19:23 +0200, Maxim Levitsky wrote:
> > On Tue, 2010-02-09 at 18:14 +0100, Peter Zijlstra wrote:
> > > On Tue, 2010-02-09 at 18:57 +0200, Maxim Levitsky wrote:
> > > > These functions can be used as long as we don't need access to global mtd table, but have
> > > > a pointer to the mtd device.
> > > >
> > > > Signed-off-by: Maxim Levitsky <maximlevitsky@gmail.com>
> > > > ---
David, I just got a great idea how to resolve the same issue in much
cleaner way.
Why not to drop the mtd table lock before calling the add notifers?
If we assume no add_mtd_device/del_mtd_device running concurrently this
should be ok. After all mtd table lock should protect only the mtd
table.
And the table only purpose it to locate an mtd device by number or name.
This purpose will always be useful, be it a static table or not.
I also remove all that mtd table junk from mtd_blktrans.c
Best regards,
Maxim Levitsky
next prev parent reply other threads:[~2010-02-10 21:25 UTC|newest]
Thread overview: 24+ messages / expand[flat|nested] mbox.gz Atom feed top
2010-02-09 16:57 [PATCH 0/17 V7] Work to enable SmartMedia/xD support in mtd subsystem Maxim Levitsky
2010-02-09 16:57 ` [PATCH 01/17] MTD: create lockless versions of {get,put}_mtd_device This will be used to resolve deadlock in block translation layer Maxim Levitsky
2010-02-09 17:14 ` Peter Zijlstra
2010-02-09 17:23 ` Maxim Levitsky
2010-02-09 17:46 ` Maxim Levitsky
2010-02-10 21:22 ` Maxim Levitsky [this message]
2010-02-09 16:57 ` [PATCH 02/17] blktrans: nuke mtd_blkcore_priv and make both thread and disk queue be per device Maxim Levitsky
2010-02-09 16:57 ` [PATCH 03/17] blktrans: track open and close calls Maxim Levitsky
2010-02-09 16:57 ` [PATCH 04/17] blktrans: don't free mtd_blktrans_dev, core will do that for you Maxim Levitsky
2010-02-09 16:57 ` [PATCH 05/17] blktrans: add proper locking Maxim Levitsky
2010-02-09 16:57 ` [PATCH 06/17] blktrans: flush all requests before we remove the device Maxim Levitsky
2010-02-09 16:57 ` [PATCH 07/17] blktrans: allow FTL drivers to export sysfs attributes Maxim Levitsky
2010-02-09 16:57 ` [PATCH 08/17] MTD: call remove notifiers before removing the device Maxim Levitsky
2010-02-09 16:57 ` [PATCH 09/17] MTD: nand: make MTD_OOB_PLACE work correctly Maxim Levitsky
2010-02-09 16:57 ` [PATCH 10/17] MTD: nand: cleanup nand_do_write_ops Maxim Levitsky
2010-02-09 16:57 ` [PATCH 11/17] MTD: nand: make suspend work if device is accessed by kernel threads Maxim Levitsky
2010-02-09 16:57 ` [PATCH 12/17] MTD: nand: make reads using MTD_OOB_RAW affect only ECC validation Maxim Levitsky
2010-02-09 16:57 ` [PATCH 13/17] NAND: make ->check_bad more user friendly Maxim Levitsky
2010-02-09 16:57 ` [PATCH 14/17] MTD: common module for smartmedia/xD support Maxim Levitsky
2010-02-09 16:57 ` [PATCH 15/17] MTD: add few workarounds to nand system for SmartMedia/xD chips Maxim Levitsky
2010-02-09 16:57 ` [PATCH 16/17] MTD: Add nand driver for ricoh xD/SmartMedia reader Maxim Levitsky
2010-02-09 16:57 ` [PATCH 17/17] MTD: Add new SmartMedia/xD FTL Maxim Levitsky
-- strict thread matches above, loose matches on Subject: below --
2010-02-04 23:30 [PATCH V6] Work to enable SmartMedia/xD support Maxim Levitsky
2010-02-04 23:30 ` [PATCH 01/17] MTD: create lockless versions of {get,put}_mtd_device This will be used to resolve deadlock in block translation layer Maxim Levitsky
2010-01-30 15:02 [PATCH V5] Work to enable SmartMedia/xD support Maxim Levitsky
2010-01-30 15:02 ` [PATCH 01/17] MTD: create lockless versions of {get,put}_mtd_device This will be used to resolve deadlock in block translation layer Maxim Levitsky
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