linux-kernel - Re: kernel BUGs when removing largish files with the SLOB allocator

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Date:	Tue, 12 Sep 2006 21:56:46 +0100
From:	David Howells <dhowells@...hat.com>
To:	Matt Mackall <mpm@...enic.com>
Cc:	David Howells <dhowells@...hat.com>, Aubrey <aubreylee@...il.com>,
	Nick Piggin <nickpiggin@...oo.com.au>,
	linux-kernel@...r.kernel.org, davidm@...pgear.com,
	gerg@...pgear.com
Subject: Re: kernel BUGs when removing largish files with the SLOB allocator 

Matt Mackall <mpm@...enic.com> wrote:

> > > You just broke the bit that shrinks the arena.
> > 
> > How?  This is only called once when things are being initialised.  There can
> > be no SLOB objects allocated prior to that point.
> 
> It's on a timer.

So what then?  The timer is still initialised:

	void kmem_cache_init(void)
	{
	+#if 0
		void *p = slob_alloc(PAGE_SIZE, 0, PAGE_SIZE-1);

		if (p)
			free_page((unsigned long)p);
	+#endif

		mod_timer(&slob_timer, jiffies + HZ);
	}

David
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