On Tue, 29 Sep 2009, Luck, Tony wrote: > > What will be the big areas of growth? dentry? inode? Something off > in networking? I'd pick dentry, but I'm biased (I happen to think the dcache is one of the most important data structures we have). Right now, in x86-64, we lay out the spinlock along with the other int-sized things, and we've tried to pack things over the years (ie put the commonly accessed ones together). See for example commit c2452f32786159ed85f0e4b21fec09258f822fc8. I do agree that none of the static spinlocks care about size, obviously. The only time the size of a spinlock matters is when it's embedded in one of the critical common data structures. And in _many_ cases you'll have pointers there that end up forcing it to 64-bit, but 'struct dentry' is an example of something where things can be (and are) more densely packed, and people have spent some time on it. Linus -- To unsubscribe from this list: send the line "unsubscribe linux-ia64" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
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