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Re: [PATCH, RFC] default to inode64 on 64-bit systems

To: Matthias Schniedermeyer <ms@xxxxxxx>
Subject: Re: [PATCH, RFC] default to inode64 on 64-bit systems
From: Eric Sandeen <sandeen@xxxxxxxxxxx>
Date: Tue, 07 Jul 2009 13:17:22 -0500
Cc: xfs mailing list <xfs@xxxxxxxxxxx>
In-reply-to: <20090707181352.GA3357@xxxxxxx>
References: <4A52419E.5020301@xxxxxxxxxxx> <20090707093802.GA32125@xxxxxxx> <4A535650.7020309@xxxxxxxxxxx> <20090707181352.GA3357@xxxxxxx>
User-agent: Thunderbird (Macintosh/20090605)
Matthias Schniedermeyer wrote:
> On 07.07.2009 09:06, Eric Sandeen wrote:
>> Matthias Schniedermeyer wrote:
>>> On 06.07.2009 13:25, Eric Sandeen wrote:
>>>> I'm tiring of telling people to use the inode64 mount option
>>>> when they are experiencing bad performance on large xfs 
>>>> filesystems...
>>>> 32-bit userspace is still largely broken when it comes to still
>>>> using 32-bit stat calls, but on 64-bit systems this should be
>>>> safe.
>>>> The only problem here is moving the disk onto a 32-bit system, or using
>>>> 32-bit apps.  But I think it's a small risk.
>>>> What do we think about the following?
>>> What is with people running 64bit kernel but 32bit Userspace?
>> Good point.  I wonder how many do that...   hrm.
> I'd guess pretty much anybody who what's to utilize the amount of RAM 
> you can have nowadays, but doesn't have any single program that needs 
> that amount of memory. Or, like in my case, just needs it for 
> tmpfs/buffer cache.
> Throw in some "i don't want to reinstall" or "my Distribution isn't 
> biarch" and you have someone who justs recompils their kernel and be 
> done with it. It took me only a few minutes (rotating my hardware around 
> that day took way longer)


I waved hands about the mount path checking whether the "mount" command
that started it was a 32-bit binary, and making a decision based on
that... and Christoph pointed out that it'd be easy ... and then he gave
me a dirty look for even thinking about it ;)


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