linux-kernel - Re: New filesystem for Linux

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Message-ID: <Pine.LNX.4.63.0611041954570.14187@alpha.polcom.net>
Date:	Sat, 4 Nov 2006 19:56:39 +0100 (CET)
From:	Grzegorz Kulewski <kangur@...com.net>
To:	Mikulas Patocka <mikulas@...ax.karlin.mff.cuni.cz>
Cc:	dean gaudet <dean@...tic.org>,
	Jörn Engel <joern@...nheim.fh-wedel.de>,
	linux-kernel@...r.kernel.org
Subject: Re: New filesystem for Linux

On Sat, 4 Nov 2006, Mikulas Patocka wrote:
>> >  If it overflows, it increases crash count instead. So really you have 
>> >  2^47
>> >  transactions or 65536 crashes and 2^31 transactions between each crash.
>>
>>  it seems to me that you only need to be able to represent a range of the
>>  most recent 65536 crashes... and could have an online process which goes
>>  about "refreshing" old objects to move them forward to the most recent
>>  crash state.  as long as you know the minimm on-disk crash count you can
>>  use it as an offset.
>
> After 65536 crashes you have to run spadfsck --reset-crash-counts. Maybe I 
> add that functionality to kernel driver too, so that it will be formally 
> corect.

Is there any reason you can not make these fields 64 or even 128 bits in 
size to increase these "limits" dramatically?


Thanks,

Grzegorz Kulewski

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