Re: [PATCH 1/5] VFS: Do (nearly) lockless generic_file_llseek

From: Andi Kleen
Date: Fri Jun 17 2011 - 13:42:51 EST

On Fri, Jun 17, 2011 at 02:40:14PM +0200, Arnd Bergmann wrote:
> On Thursday 16 June 2011 23:07:18 Andi Kleen wrote:
> > So still need a lock, but can use a cheap local one.
> >
> > This patch implements this new scheme in generic_file_llseek.
> > I dropped generic_file_llseek_unlocked and changed all callers.
> What about default_llseek? If you change generic_file_llseek, you should
> probably change that, too.

That's used by a lot of drivers, and since I cannot audit them
all I chose to be conservative. not sure it's ever performance
critical anyways?


ak@xxxxxxxxxxxxxxx -- Speaking for myself only.
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