Re: SLUB defrag pull request?

From: Pekka Enberg
Date: Wed Oct 22 2008 - 16:49:16 EST

On Wed, Oct 22, 2008 at 11:26 PM, Miklos Szeredi <miklos@xxxxxxxxxx> wrote:
> Because you don't _need_ a reliable reference to access the contents
> of the dentry. The dentry is still there after being freed, as long
> as the underlying slab is there and isn't being reused for some other
> purpose. But you can easily ensure that from the slab code.
> Hmm?

Actually, when debugging is enabled, it's customary to poison the
object, for example (see free_debug_processing() in mm/slub.c). So we
really can't "easily ensure" that in the allocator unless we by-pass
all the current debugging code.
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