* Christoph Lameter ([EMAIL PROTECTED]) wrote:
> Provide an alternate implementation of the SLUB fast paths for alloc
> and free using cmpxchg_local. The cmpxchg_local fast path is selected
> for arches that have CONFIG_FAST_CMPXCHG_LOCAL set. An arch should only
> set CONFIG_FAST_CMPXCHG_LOCAL if
* Christoph Lameter ([EMAIL PROTECTED]) wrote:
> On Tue, 30 Oct 2007, Andrew Morton wrote:
>
> > Let's cc linux-arch: presumably other architectures can implement cpu-local
> > cmpxchg and would see some benefit from doing so.
>
> Matheiu had a whole series of cmpxchg_local patches. Ccing him too
On Tue, 30 Oct 2007, Andrew Morton wrote:
> Let's cc linux-arch: presumably other architectures can implement cpu-local
> cmpxchg and would see some benefit from doing so.
Matheiu had a whole series of cmpxchg_local patches. Ccing him too. I
think he has some numbers for other architectures.
>
On Sat, 27 Oct 2007 20:32:04 -0700
Christoph Lameter <[EMAIL PROTECTED]> wrote:
> Provide an alternate implementation of the SLUB fast paths for alloc
> and free using cmpxchg_local. The cmpxchg_local fast path is selected
> for arches that have CONFIG_FAST_CMPXCHG_LOCAL set. An arch should only
>
On Sun, 28 Oct 2007 15:05:50 +0200 (EET)
Pekka J Enberg <[EMAIL PROTECTED]> wrote:
> On Sat, 27 Oct 2007, Christoph Lameter wrote:
> > The alternate path is realized using #ifdef's. Several attempts to do the
> > same with macros and in line functions resulted in a mess (in particular due
> > to t
On Sun, 28 Oct 2007, Pekka J Enberg wrote:
> - local_irq_restore(flags);
> + object = do_slab_alloc(s, c, gfpflags, node, addr);
> + if (unlikely(!object))
> + goto out;
Undoing the optimization that one of the earlier patches added.
The #ifdef version is for me at least
On Sun, 28 Oct 2007, Pekka J Enberg wrote:
> Can you please write a comment of the locking rules when cmpxchg_local()
> is used? Looks as if we could push that local_irq_save() to slub_lock()
> and local_irq_restore() to slub_unlock() and deal with the unused flags
> variable for the non-CONFIG
On Sat, 27 Oct 2007, Christoph Lameter wrote:
> The alternate path is realized using #ifdef's. Several attempts to do the
> same with macros and in line functions resulted in a mess (in particular due
> to the strange way that local_interrupt_save() handles its argument and due
> to the need to def
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