From: David Woodhouse <dwmw2@infradead.org>
To: Robert Kaiser <rob@sysgo.de>
Cc: linux-mtd@lists.infradead.org
Subject: Re: Re-entrancy of flash erase/write
Date: Fri, 22 Feb 2002 17:06:52 +0000 [thread overview]
Message-ID: <23802.1014397612@redhat.com> (raw)
In-Reply-To: <Pine.LNX.4.21.0202221726010.8843-100000@dagobert.svc.sysgo.de>
rob@sysgo.de said:
> Am I right in assuming that it is not possible to erase and/or write
> different blocks of the same flash chip concurrently ?
No - on some chips you can. Not most though.
> If so, where is the lock in the MTD code that would prevent concurrent
> execution of erase/write on the same chip by multiple processes ?
In the chip drivers themselves. Grep for TASK_UNINTERRUPTIBLE in
cfi_cmdset_0001.c, for example.
--
dwmw2
next prev parent reply other threads:[~2002-02-22 16:55 UTC|newest]
Thread overview: 17+ messages / expand[flat|nested] mbox.gz Atom feed top
2002-02-22 16:30 Re-entrancy of flash erase/write Robert Kaiser
2002-02-22 17:06 ` David Woodhouse [this message]
2002-02-22 17:43 ` Robert Kaiser
2002-02-25 11:09 ` Robert Kaiser
2002-02-25 15:44 ` Adam Wozniak
2002-02-25 16:54 ` Robert Kaiser
2002-02-25 16:55 ` Adam Wozniak
2002-02-25 17:07 ` David Woodhouse
2002-02-25 17:30 ` Robert Kaiser
2002-02-25 17:32 ` David Woodhouse
2002-02-25 17:49 ` Joakim Tjernlund
2002-02-25 17:54 ` David Woodhouse
2002-02-25 18:08 ` Joakim Tjernlund
2002-02-25 18:10 ` David Woodhouse
2002-02-25 17:56 ` Robert Kaiser
2002-02-25 18:11 ` Joakim Tjernlund
-- strict thread matches above, loose matches on Subject: below --
2002-02-22 17:13 Jonas Holmberg
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