linux-kernel - Re: New filesystem for Linux

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Date:	Sun, 05 Nov 2006 01:58:56 +0000
From:	Alan Cox <alan@...rguk.ukuu.org.uk>
To:	Mikulas Patocka <mikulas@...ax.karlin.mff.cuni.cz>
Cc:	Eric Dumazet <dada1@...mosbay.com>, linux-kernel@...r.kernel.org
Subject: Re: New filesystem for Linux

Ar Sad, 2006-11-04 am 19:40 +0100, ysgrifennodd Mikulas Patocka:
> > The problem with a per_cpu biglock is that you may consume a lot of RAM for 
> > big NR_CPUS. Count 32 KB per 'biglock' if NR_CPUS=1024
> 
> Does one Linux kernel run on system with 1024 cpus? I guess it must fry 
> spinlocks... (or even lockup due to spinlock livelocks)

Altix goes that big and bigger. 

Alan
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