From: Steven Scholz <steven.scholz@imc-berlin.de>
To: David Woodhouse <dwmw2@infradead.org>
Cc: MTD <linux-mtd@lists.infradead.org>
Subject: Re: Stopping the GC thread?
Date: Thu, 12 Jun 2003 11:35:59 +0200 [thread overview]
Message-ID: <3EE8497F.30402@imc-berlin.de> (raw)
In-Reply-To: 1055409538.2097.438.camel@passion.cambridge.redhat.com
David,
>>2.) What happnens when I send a SIGSTOP in the middle of a running GC?
>>Will it stop immediately? Or will it take a while?
>
>
> It'll finish copying the node it's _currently_ garbage-collecting, which
> may involve decompressing up to a page of data, recompressing it and
> writing it out elsewhere. It may also need to wait for erases to
> complete.
>
> Even after it's stopped, if there are erasable blocks on the queue,
> they'll continue to be erased in the background by kupdated. You cannot
> prevent that.
But the impact on system performance done by kupdated is not as
critical as the one that's done by the GC intself, is it?
>
>>I suppose that a few more sectors will be examened and written...
>>(10ms, 100ms, 1000ms ...???)
>
>
> 'sector'? Read http://sources.redhat.com/jffs2/jffs2.pdf
I meant flash sectors.
Steven
next prev parent reply other threads:[~2003-06-12 9:35 UTC|newest]
Thread overview: 11+ messages / expand[flat|nested] mbox.gz Atom feed top
2003-06-11 16:03 Stopping the GC thread? Steven Scholz
2003-06-11 16:07 ` David Woodhouse
2003-06-11 16:12 ` Steven Scholz
2003-06-11 16:18 ` David Woodhouse
2003-06-11 16:20 ` Steven Scholz
2003-06-11 16:23 ` David Woodhouse
2003-06-12 9:08 ` Steven Scholz
2003-06-12 9:18 ` David Woodhouse
2003-06-12 9:35 ` Steven Scholz [this message]
2003-06-12 9:41 ` David Woodhouse
2003-06-12 9:52 ` Jörn Engel
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