Re: [PATCH] BTRFS: Transpose parent_objectid and parent_gen in struct btrfs_fid

From: David Howells
Date: Wed Mar 18 2009 - 13:39:21 EST


David Woodhouse <dwmw2@xxxxxxxxxxxxx> wrote:

> But this struct is packed anyway -- we're not changing much on the wire;
> it's just a case of how efficient it is to load that single uint64_t
> from an unaligned location. Is that _really_ something we're ever going
> to notice?

If the CPU doing the load/store throws a misalignment exception or just
ignores the instruction because it's misaligned, it might make for interesting
debugging.

David
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