linux-kernel - Re: [PATCH 2/6] BC: beancounters core (API)

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Message-ID: <20060823135311.GD10449@martell.zuzino.mipt.ru>
Date:	Wed, 23 Aug 2006 17:53:11 +0400
From:	Alexey Dobriyan <adobriyan@...il.com>
To:	Kirill Korotaev <dev@...ru>
Cc:	Andrew Morton <akpm@...l.org>,
	Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
	Alan Cox <alan@...rguk.ukuu.org.uk>,
	Christoph Hellwig <hch@...radead.org>,
	Pavel Emelianov <xemul@...nvz.org>,
	Andrey Savochkin <saw@...ru>, devel@...nvz.org,
	Rik van Riel <riel@...hat.com>, Andi Kleen <ak@...e.de>,
	Greg KH <greg@...ah.com>, Oleg Nesterov <oleg@...sign.ru>,
	Matt Helsley <matthltc@...ibm.com>,
	Rohit Seth <rohitseth@...gle.com>,
	Chandra Seetharaman <sekharan@...ibm.com>
Subject: Re: [PATCH 2/6] BC: beancounters core (API)

> >>+void __put_beancounter(struct beancounter *bc)
> >>+{
> >>+	unsigned long flags;
> >>+
> >>+	/* equivalent to atomic_dec_and_lock_irqsave() */
> >>+	local_irq_save(flags);
> >>+	if (likely(!atomic_dec_and_lock(&bc->bc_refcount, &bc_hash_lock))) {
> >>+		local_irq_restore(flags);
> >>+		if (unlikely(atomic_read(&bc->bc_refcount) < 0))
> >>+			printk(KERN_ERR "BC: Bad refcount: bc=%p, "
> >>+					"luid=%d, ref=%d\n",
> >>+					bc, bc->bc_id,
> >>+					atomic_read(&bc->bc_refcount));
> >
> >
> >Should this BUG_ON() ?
> BUG_ON doesn't print much information :)
> ok, will replace

but printk + BUG does ;-)

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