On 7/13/07, Robert P. J. Day <rpjday@xxxxxxxxxxxxxx> wrote:
i just noticed that, while those are two separate macros, they are currently equivalent, not to mention: $ grep -rw PAGE_SIZE * | grep PAGE_CACHE_SIZE fs/ntfs/compress.c: * PAGE_CACHE_SIZE != PAGE_SIZE but for now there is no problem. fs/ntfs/compress.c: * when we get PAGE_CACHE_SIZE != PAGE_SIZE but include/linux/pagemap.h:#define PAGE_CACHE_SIZE PAGE_SIZE include/linux/pagemap.h: * not true if PAGE_CACHE_SIZE > PAGE_SIZE. mm/shmem.c: * Will need changing if PAGE_CACHE_SIZE != PAGE_SIZE ok, so if they were different, that would be an issue, but what are the chances of that ever happening? just curious.
See Christoph Lameter's recent posts on linux-mm for "variable order page cache". As far as "chances", I dunno, but it's definitely a feature many folks would like to see in one way or the other (an alternative is Nick Piggin's fsblock). Thanks, Nish -- To unsubscribe from this list: send an email with "unsubscribe kernelnewbies" to ecartis@xxxxxxxxxxxx Please read the FAQ at http://kernelnewbies.org/FAQ
