This is v3 of a patch series that changes the reading and caching of
the `packed-refs` file to use `mmap()`. Thanks to Stefan, Peff, Dscho,
and Junio for their comments about v2. I think I have addressed all of
the feedback from v1 [1] and v2 [2].
This version has only minor changes relative to v2:
* Fixed a trivial error in the commit message for patch 08.
* In patch 13:
* In the commit message, explain the appearance of `MMAP_TEMPORARY`
even though it is not yet treated differently than `MMAP_NONE`.
* In `Makefile`, don't make `USE_WIN32_MMAP` imply
`MMAP_PREVENTS_DELETE`.
* Correct the type of a local variable from `size_t` to `ssize_t`.
This patch series is also available from my GitHub repo [3] as branch
`mmap-packed-refs`.
[1] http://public-inbox.org/git/cover.1505319366.git.mhagger@xxxxxxxxxxxx/
[2] https://public-inbox.org/git/cover.1505799700.git.mhagger@xxxxxxxxxxxx/
[3] https://github.com/mhagger/git/
Jeff King (1):
prefix_ref_iterator: break when we leave the prefix
Michael Haggerty (20):
ref_iterator: keep track of whether the iterator output is ordered
packed_ref_cache: add a backlink to the associated `packed_ref_store`
die_unterminated_line(), die_invalid_line(): new functions
read_packed_refs(): use mmap to read the `packed-refs` file
read_packed_refs(): only check for a header at the top of the file
read_packed_refs(): make parsing of the header line more robust
read_packed_refs(): read references with minimal copying
packed_ref_cache: remember the file-wide peeling state
mmapped_ref_iterator: add iterator over a packed-refs file
mmapped_ref_iterator_advance(): no peeled value for broken refs
packed-backend.c: reorder some definitions
packed_ref_cache: keep the `packed-refs` file mmapped if possible
read_packed_refs(): ensure that references are ordered when read
packed_ref_iterator_begin(): iterate using `mmapped_ref_iterator`
packed_read_raw_ref(): read the reference from the mmapped buffer
ref_store: implement `refs_peel_ref()` generically
packed_ref_store: get rid of the `ref_cache` entirely
ref_cache: remove support for storing peeled values
mmapped_ref_iterator: inline into `packed_ref_iterator`
packed-backend.c: rename a bunch of things and update comments
Makefile | 6 +
config.mak.uname | 3 +
refs.c | 22 +-
refs/files-backend.c | 54 +--
refs/iterator.c | 47 ++-
refs/packed-backend.c | 979 ++++++++++++++++++++++++++++++++++++++------------
refs/ref-cache.c | 44 +--
refs/ref-cache.h | 35 +-
refs/refs-internal.h | 26 +-
9 files changed, 847 insertions(+), 369 deletions(-)
--
2.14.1
