linux-kernel - Re: [PATCH] nanosecond filesystem support???

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Message-ID: <b6a2187b0702130109n16cea6a1oae5761707c17e10f@mail.gmail.com>
Date:	Tue, 13 Feb 2007 17:09:46 +0800
From:	"Jeff Chua" <jeff.chua.linux@...il.com>
To:	"Andi Kleen" <andi@...stfloor.org>
Cc:	lkml <linux-kernel@...r.kernel.org>,
	"Arjan van de Ven" <arjan@...radead.org>,
	"Miquel van Smoorenburg" <miquels@...tron.nl>,
	"Linus Torvalds" <torvalds@...l.org>
Subject: Re: [PATCH] nanosecond filesystem support???

On 2/13/07, Arjan van de Ven <arjan@...radead.org> wrote:
> it was there to avoid the following situation:
> on disk it's still in seconds

On 2/13/07, Andi Kleen <andi@...stfloor.org> wrote:

> If you want ns resolution you need a file system that supports it:
> that's currently XFS, JFS, NTFS/CIFS (resolution is lower, but < 1s), NFSv[34], UDF,
> with suitable servers,  tmpfs/ramfs/hugetlbfs. ext4 ns support is being worked on,
>
> BTW the real max resolution supported in the kernel right now is jiffies.

Andy, Arjan,

Ok, I got it now. Well, after reboot, I ran stat() and since the info
has to come from disk, now the nanosec returned is zero!

Thanks for all your help.

Jeff.
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