Messages in this thread | | | Date | Wed, 29 Feb 2012 09:24:30 -0600 (CST) | From | Christoph Lameter <> | Subject | Re: [PATCH -next] slub: set PG_slab on all of slab pages |
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On Wed, 29 Feb 2012, Namhyung Kim wrote:
> Unlike SLAB, SLUB doesn't set PG_slab on tail pages, so if a user would > call free_pages() incorrectly on a object in a tail page, she will get > confused with the undefined result. Setting the flag would help her by > emitting a warning on bad_page() in such a case.
NAK
You cannot free a tail page of a compound higher order page independently. You must free the whole compound.
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