linux-kernel - Re: Fwd: uprobes: register/unregister probes.

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Message-ID: <20111124064853.GA28065@linux.vnet.ibm.com>
Date:	Thu, 24 Nov 2011 12:18:53 +0530
From:	Srikar Dronamraju <srikar@...ux.vnet.ibm.com>
To:	Peter Zijlstra <peterz@...radead.org>,
	Linus Torvalds <torvalds@...ux-foundation.org>
Cc:	Oleg Nesterov <oleg@...hat.com>,
	Andrew Morton <akpm@...ux-foundation.org>,
	LKML <linux-kernel@...r.kernel.org>,
	Linux-mm <linux-mm@...ck.org>, Ingo Molnar <mingo@...e.hu>,
	Andi Kleen <andi@...stfloor.org>,
	Christoph Hellwig <hch@...radead.org>,
	Steven Rostedt <rostedt@...dmis.org>,
	Roland McGrath <roland@...k.frob.com>,
	Thomas Gleixner <tglx@...utronix.de>,
	Masami Hiramatsu <masami.hiramatsu.pt@...achi.com>,
	Arnaldo Carvalho de Melo <acme@...radead.org>,
	Anton Arapov <anton@...hat.com>,
	Ananth N Mavinakayanahalli <ananth@...ibm.com>,
	tulasidhard@...il.com, Jim Keniston <jkenisto@...ux.vnet.ibm.com>
Subject: Re: Fwd: uprobes: register/unregister probes.

> 
> On Fri, 2011-11-18 at 16:37 +0530, Srikar Dronamraju wrote:
> > +#define UPROBES_HASH_SZ        13
> > +/* serialize (un)register */
> > +static struct mutex uprobes_mutex[UPROBES_HASH_SZ];
> > +#define uprobes_hash(v)        (&uprobes_mutex[((unsigned long)(v)) %\
> > +                                               UPROBES_HASH_SZ])
> 
> Was there any reason to for using this hasing scheme, say over hash.h?

There is no specific reason for choosing this hashing scheme over the
current. I just say ext4_aio_mutex in fs/ext4/ext4.h and did something
similar.

-- 
Thanks and Regards
Srikar

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