Re: [PATCH] mm: sl[auo]b: Use atomic bit operations to updatepage-flags.
From: Eric Dumazet
Date: Tue May 08 2012 - 15:11:17 EST
On Tue, 2012-05-08 at 11:55 -0700, Pravin B Shelar wrote:
> Transparent huge pages can change page->flags (PG_compound_lock)
> without taking Slab lock. So sl[auo]b need to use atomic bit
> operation while changing page->flags.
> Specificly this patch fixes race between compound_unlock and slab
> functions which does page-flags update. This can occur when
> get_page/put_page is called on page from slab object.
But should get_page()/put_page() be called on a page own by slub ?
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