Messages in this thread | | | Date | Fri, 2 Mar 2007 04:49:10 +0000 | From | Christoph Hellwig <> | Subject | Re: PATCH 2.6.21-rc1 aoe: handle zero _count pages in bios |
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On Thu, Mar 01, 2007 at 08:48:06PM -0800, Andrew Morton wrote: > On Fri, 2 Mar 2007 04:30:39 +0000 Christoph Hellwig <hch@infradead.org> wrote: > > > But in this case we'd really need to enforce this, and add a > > BUG_ON(PageSlab(page)) in bio_add_page to trip everyone submit > > this kind of pages. > > That would be > > BUG_ON(PageSlab(page) && page_count(page) == 0)?
No, all slab pages. Currently they all have a reference count of zero, but we generally don't want people to pass in pages that come from a non-refcounted allocator.
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