Messages in this thread | | | Date | Wed, 22 Oct 2008 23:48:56 +0300 | From | "Pekka Enberg" <> | Subject | Re: SLUB defrag pull request? |
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On Wed, Oct 22, 2008 at 11:26 PM, Miklos Szeredi <miklos@szeredi.hu> 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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