linux-kernel - Re: New filesystem for Linux

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Date:	Fri, 3 Nov 2006 20:51:46 +0100
From:	Adrian Bunk <bunk@...sta.de>
To:	Mikulas Patocka <mikulas@...ax.karlin.mff.cuni.cz>
Cc:	Jörn Engel <joern@...nheim.fh-wedel.de>,
	linux-kernel@...r.kernel.org
Subject: Re: New filesystem for Linux

On Fri, Nov 03, 2006 at 02:31:46PM +0100, Mikulas Patocka wrote:
> >>>I am fully aware the counters are effectively 48-bit.  If they were
> >>>just 32-bit, you would likely have hit the problem yourself already.
> >>
> >>Given the seek time 0.01s, 31-bit value would last for minimum time of 248
> >>days when doing only syncs and nothing else. 47-bit value will last for
> >>reasonably long.
> >
> >So you can at most do one transaction per drive seek?  That would
> >definitely solve the overflow case, but hardly sounds like a
> >high-performance filesystem. :)
> 
> Really it can batch any number of modifications into one transaction 
> (unless fsync or sync is called). Transaction is closed only on 
> fsync/sync, if 2 minutes pass (can be adjusted) or when the disk runs out 
> of space.

O_DIRECT ?
O_SYNC ?

> Mikulas

cu
Adrian

-- 

       "Is there not promise of rain?" Ling Tan asked suddenly out
        of the darkness. There had been need of rain for many days.
       "Only a promise," Lao Er said.
                                       Pearl S. Buck - Dragon Seed

-
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@...r.kernel.org
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/