From: Pekka Enberg <penberg@kernel.org>
To: David Rientjes <rientjes@google.com>
Cc: Glauber Costa <glommer@parallels.com>,
linux-mm@kvack.org, Cristoph Lameter <cl@linux.com>,
Pekka Enberg <penberg@cs.helsinki.fi>
Subject: Re: [PATCH 3/4] slab: move FULL state transition to an initcall
Date: Mon, 2 Jul 2012 13:57:12 +0300 (EEST) [thread overview]
Message-ID: <alpine.LFD.2.02.1207021357050.1916@tux.localdomain> (raw)
In-Reply-To: <alpine.DEB.2.00.1206210100260.31077@chino.kir.corp.google.com>
On Thu, 21 Jun 2012, David Rientjes wrote:
> > During kmem_cache_init_late(), we transition to the LATE state,
> > and after some more work, to the FULL state, its last state
> >
> > This is quite different from slub, that will only transition to
> > its last state (previously SYSFS), in a (late)initcall, after a lot
> > more of the kernel is ready.
> >
> > This means that in slab, we have no way to taking actions dependent
> > on the initialization of other pieces of the kernel that are supposed
> > to start way after kmem_init_late(), such as cgroups initialization.
> >
> > To achieve more consistency in this behavior, that patch only
> > transitions to the UP state in kmem_init_late. In my analysis,
> > setup_cpu_cache() should be happy to test for >= UP, instead of
> > == FULL. It also has passed some tests I've made.
> >
> > We then only mark FULL state after the reap timers are in place,
> > meaning that no further setup is expected.
> >
> > Signed-off-by: Glauber Costa <glommer@parallels.com>
> > Acked-by: Christoph Lameter <cl@linux.com>
> > CC: Pekka Enberg <penberg@cs.helsinki.fi>
> > CC: David Rientjes <rientjes@google.com>
>
> Acked-by: David Rientjes <rientjes@google.com>
>
> [ Might want to fix your address book in your email client because
> Christoph's name is misspelled in the cc list. ]
Applied, thanks!
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next prev parent reply other threads:[~2012-07-02 10:57 UTC|newest]
Thread overview: 17+ messages / expand[flat|nested] mbox.gz Atom feed top
2012-06-20 20:59 [PATCH 0/4] cache-specific changes for memcg (preparation) Glauber Costa
2012-06-20 20:59 ` [PATCH 1/4] slab: rename gfpflags to allocflags Glauber Costa
2012-06-21 7:53 ` David Rientjes
2012-06-20 20:59 ` [PATCH 2/4] Wipe out CFLGS_OFF_SLAB from flags during initial slab creation Glauber Costa
2012-06-21 7:59 ` David Rientjes
2012-06-20 20:59 ` [PATCH 3/4] slab: move FULL state transition to an initcall Glauber Costa
2012-06-21 8:01 ` David Rientjes
2012-07-02 10:57 ` Pekka Enberg [this message]
2012-06-20 20:59 ` [PATCH 4/4] don't do __ClearPageSlab before freeing slab page Glauber Costa
2012-06-21 8:04 ` David Rientjes
2012-06-21 8:13 ` Glauber Costa
2012-06-21 11:04 ` Kamezawa Hiroyuki
2012-06-21 11:14 ` Glauber Costa
2012-06-21 20:24 ` Glauber Costa
2012-07-03 18:42 ` Christoph Lameter
2012-07-03 18:40 ` Christoph Lameter
-- strict thread matches above, loose matches on Subject: below --
2012-06-14 12:17 [PATCH 0/4] Proposed slab patches as basis for memcg Glauber Costa
2012-06-14 12:17 ` [PATCH 3/4] slab: move FULL state transition to an initcall Glauber Costa
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