linux-kernel - Re: [PATCH V6 3/3] efi: Distinguish between "remaining space" and actually used space

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Date:	Wed, 24 Apr 2013 18:59:33 +0800
From:	joeyli <jlee@...e.com>
To:	Matthew Garrett <matthew.garrett@...ula.com>
Cc:	"matt.fleming@...el.com" <matt.fleming@...el.com>,
	"linux-efi@...r.kernel.org" <linux-efi@...r.kernel.org>,
	"x86@...nel.org" <x86@...nel.org>,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH V6 3/3] efi: Distinguish between "remaining space" and
 actually used space

於 三，2013-04-24 於 10:14 +0000，Matthew Garrett 提到：
> On Wed, 2013-04-24 at 18:08 +0800, joeyli wrote:
> 
> > It causes the garbage size increased and remaining_size decreased. But
> > we still can create new variable because active_size doesn't increase
> > due to we delete variable before create new. So, the condition
> > "remaining_size - size < storage_size / 2" will not really hit because
> > active_size condition is pass.
> 
> That's fine - the (limited) information we have from Samsung is that
> there's no problem if all the space is dirty, only if all the space is
> marked as active.
> 
> -- 
> Matthew Garrett | mjg59@...f.ucam.org

Got it! Thanks for your explanation!

Then why we don't just remove the "remaining_size" condition but only
monitor the active_size should not larger then 1/2 storage_size?

Does that because we allow one and only one VAR_METADATA_SIZE beyond the
1/2 storage? If so, why we don't just give ( 1/2 storage_size +
VAR_METADATA_SIZ) space for active_size using?


Thanks a lot!
Joey Lee


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