On Mon, 25 May 2009 18:45:25 -0700 Roland Dreier <rdreier@xxxxxxxxx> wrote: > > Ideally there should be a MACRO that is defined to WORD_SIZE on cache-coherent > > ARCHs and to SMP_CACHE_BYTES on none-cache-coherent systems and use that size > > at the __align() attribute. (So only stupid ARCHES get hurt) > > this seems to come up repeatedly -- I had a proposal a _long_ time ago > that never quite got merged, cf http://lwn.net/Articles/2265/ and > http://lwn.net/Articles/2269/ -- from 2002 (!?). The idea is to go a Yeah, I think that Benjamin did last time: http://www.mail-archive.com/linux-scsi@xxxxxxxxxxxxxxx/msg12632.html IIRC, James didn't like it so I wrote the current code. I didn't see any big performance difference with scsi_debug: http://marc.info/?l=linux-scsi&m=120038907123706&w=2 Jens, you see the performance difference due to this unification? Personally, I don't fancy __cached_alignment__ annotation much. I prefer to leave it behind a memory allocator. > step further and create a __dma_buffer annotation for structure members. -- To unsubscribe from this list: send the line "unsubscribe linux-fsdevel" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
