From: Eric Dumazet <[EMAIL PROTECTED]>
Date: Thu, 18 Aug 2005 09:14:47 +0200
> After reading your suggestions, I understand we still need two slabs.
> One (filp_cachep) without the readahead data, the other one
> (filp_ra_cachep) with it.
Correct.
> static inline struct file_ra_state *get_ra_state(struct file *f)
> {
> #ifdef CONFIG_DEBUG_READAHEAD
> BUG_ON(filp_ra_cachep != GET_PAGE_CACHE(virt_to_page(f)));
> #endif
> return (struct file_ra_state *)(f+1);
> }
Or, instead of mucking with SLAB internals, just put something like
a "filp_ra_present" debugging binary state into filp while it gets
debugged.
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