On Wed, Apr 20, 2016 at 6:27 AM, David Turner <dtur...@twopensource.com> wrote: > From: Nguyễn Thái Ngọc Duy <pclo...@gmail.com> > > Later, we will introduce git index-helper to share this memory with > other git processes. > > Since the memory will be shared, it will never be unmapped (although > the kernel may of course choose to page it out).
This is not entirely true. We do need to keep the mmap'd memory for longer, even after read_index_from() finishes. But we do not share the exact same address space to other processes (memcpy is used in index-helper.c:share_index()). We could even discard_index() at the end of share_index(), but I think we keep it anyway just in case another process asks, or when index is not updated. -- Duy -- To unsubscribe from this list: send the line "unsubscribe git" in the body of a message to majord...@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html
