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Re: [PATCH v2 02/16] odb: move list of packfiles into `struct packfile_store`

From
Taylor Blau <me@ttaylorr.com>
Date
Sep 11, 2025, 23:16 UTC
Message-ID
<aMNYaPSnf6JP7bNj@nand.local>
In-Reply-To
<aLav4UAcfQjvNzMF@pks.im>
On Tue, Sep 02, 2025 at 10:50:41AM +0200, Patrick Steinhardt wrote:
Show 19 quoted lines
> > > diff --git a/packfile.c b/packfile.c
> > > index 8fbf1cfc2d..6478e4cc30 100644
> > > --- a/packfile.c
> > > +++ b/packfile.c
> > > @@ -278,7 +278,7 @@ static int unuse_one_window(struct packed_git *current)
> > >
> > >  	if (current)
> > >  		scan_windows(current, &lru_p, &lru_w, &lru_l);
> > > -	for (p = current->repo->objects->packed_git; p; p = p->next)
> > > +	for (p = current->repo->objects->packfiles->packs; p; p = p->next)
> >
> > Not a huge deal, but I do find "current->repo->objects->packfiles->packs"
> > to be a bit unfortunate. I wonder if we should rename "packs" to "head"
> > or "list_head" or similar since it's clear from
> > "current->repo->objects->packfiles" that this is a list of packfiles.
>
> I'd like to keep this part as-is for now if you don't mind. This is
> mostly because I've got a follow-up patch series that _does_ introduce
> `head` as part of making the `->next` pointer go away.

I'm OK with that approach provided that you have a plan to introduce "head" here ;-).

Show 21 quoted lines
> > > @@ -2344,5 +2339,23 @@ struct packfile_store *packfile_store_new(struct object_database *odb)
> > >
> > >  void packfile_store_free(struct packfile_store *store)
> > >  {
> > > +	packfile_store_close(store);
> >
> > Seeing a call to packfile_store_close() here was a little surprising to
> > me. The code that you are moving has a comment that says:
> >
> >    * `close_object_store()` only closes the packfiles, but doesn't free
> >    * them. We thus have to do this manually.
> >
> > , so I would have expected to preserve that behavior.
>
> This behaviour is preserved though. Calling `packfile_store_close()`
> does not free the packfiles, it only closes them. And we continue to
> call `packfile_store_close()` in `close_object_store()`, so nothing
> changes.
>
> The only change in behaviour is that we now also know to close packfiles
> when freeing the packfile store.

Why is that change necessary? I am not trying to be overly pedantic here, but as you note above this code is extremely fragile, so I am trying to avoid any changes that are not strictly necessary.

Thanks, Taylor

Previous: Patrick SteinhardtNext: Patrick Steinhardt
Message 54 of 181 in “packfile: carve out a new packfile store”
  1. 00/16 packfile: carve out a new packfile storePatrick Steinhardt, Aug 19, 2025
  2. 01/16 packfile: introduce a new `struct packfile_store`Patrick Steinhardt, Aug 19, 2025
  3. Karthik NayakAug 19, 2025
  4. Patrick SteinhardtAug 20, 2025
  5. Junio C HamanoAug 19, 2025
  6. Patrick SteinhardtAug 20, 2025
  7. 02/16 odb: move list of packfiles into `struct packfile_store`Patrick Steinhardt, Aug 19, 2025
  8. 03/16 odb: move initialization bit into `struct packfile_store`Patrick Steinhardt, Aug 19, 2025
  9. Karthik NayakAug 19, 2025
  10. Junio C HamanoAug 19, 2025
  11. Karthik NayakAug 20, 2025
  12. Junio C HamanoAug 22, 2025
  13. Documentation: note styling for bit fieldsKarthik Nayak, Aug 26, 2025
  14. Patrick SteinhardtAug 20, 2025
  15. Junio C HamanoAug 20, 2025
  16. 04/16 odb: move packfile map into `struct packfile_store`Patrick Steinhardt, Aug 19, 2025
  17. 05/16 odb: move MRU list of packfiles into `struct packfile_store`Patrick Steinhardt, Aug 19, 2025
  18. Karthik NayakAug 20, 2025
  19. Jeff KingAug 20, 2025
  20. Patrick SteinhardtAug 21, 2025
  21. 06/16 odb: move kept cache into `struct packfile_store`Patrick Steinhardt, Aug 19, 2025
  22. Junio C HamanoAug 19, 2025
  23. Patrick SteinhardtAug 20, 2025
  24. 07/16 packfile: reorder functions to avoid function declarationPatrick Steinhardt, Aug 19, 2025
  25. Junio C HamanoAug 19, 2025
  26. 08/16 packfile: refactor `prepare_packed_git()` to work on packfile storePatrick Steinhardt, Aug 19, 2025
  27. 09/16 packfile: split up responsibilities of `reprepare_packed_git()`Patrick Steinhardt, Aug 19, 2025
  28. Karthik NayakAug 20, 2025
  29. 10/16 packfile: refactor `install_packed_git()` to work on packfile storePatrick Steinhardt, Aug 19, 2025
  30. 11/16 packfile: always add packfiles to MRU when adding a packPatrick Steinhardt, Aug 19, 2025
  31. Karthik NayakAug 20, 2025
  32. 12/16 packfile: introduce function to load and add packfilesPatrick Steinhardt, Aug 19, 2025
  33. Karthik NayakAug 20, 2025
  34. Patrick SteinhardtAug 21, 2025
  35. 13/16 packfile: move `get_multi_pack_index()` into "midx.c"Patrick Steinhardt, Aug 19, 2025
  36. 14/16 packfile: remove `get_packed_git()`Patrick Steinhardt, Aug 19, 2025
  37. Karthik NayakAug 20, 2025
  38. Patrick SteinhardtAug 21, 2025
  39. Karthik NayakAug 20, 2025
  40. 15/16 packfile: refactor `get_all_packs()` to work on packfile storePatrick Steinhardt, Aug 19, 2025
  41. Karthik NayakAug 20, 2025
  42. Patrick SteinhardtAug 21, 2025
  43. 16/16 packfile: refactor `get_packed_git_mru()` to work on packfile storePatrick Steinhardt, Aug 19, 2025
  44. Junio C HamanoAug 19, 2025
  45. Karthik NayakAug 20, 2025
  46. 00/16 packfile: carve out a new packfile storePatrick Steinhardt, Aug 21, 2025
  47. 01/16 packfile: introduce a new `struct packfile_store`Patrick Steinhardt, Aug 21, 2025
  48. 02/16 odb: move list of packfiles into `struct packfile_store`Patrick Steinhardt, Aug 21, 2025
  49. Taylor BlauAug 25, 2025
  50. Patrick SteinhardtSep 2, 2025
  51. Taylor BlauSep 2, 2025
  52. Junio C HamanoSep 2, 2025
  53. Patrick SteinhardtSep 3, 2025
  54. Taylor BlauSep 11, 2025
  55. Patrick SteinhardtSep 15, 2025
  56. 03/16 odb: move initialization bit into `struct packfile_store`Patrick Steinhardt, Aug 21, 2025
  57. Taylor BlauAug 26, 2025
  58. 04/16 odb: move packfile map into `struct packfile_store`Patrick Steinhardt, Aug 21, 2025
  59. Taylor BlauAug 26, 2025
  60. 05/16 odb: move MRU list of packfiles into `struct packfile_store`Patrick Steinhardt, Aug 21, 2025
  61. 06/16 odb: move kept cache into `struct packfile_store`Patrick Steinhardt, Aug 21, 2025
  62. Taylor BlauAug 26, 2025
  63. Patrick SteinhardtSep 2, 2025
  64. 07/16 packfile: reorder functions to avoid function declarationPatrick Steinhardt, Aug 21, 2025
  65. Taylor BlauAug 26, 2025
  66. 08/16 packfile: refactor `prepare_packed_git()` to work on packfile storePatrick Steinhardt, Aug 21, 2025
  67. Taylor BlauAug 26, 2025
  68. 09/16 packfile: split up responsibilities of `reprepare_packed_git()`Patrick Steinhardt, Aug 21, 2025
  69. Taylor BlauAug 26, 2025
  70. Patrick SteinhardtSep 2, 2025
  71. 10/16 packfile: refactor `install_packed_git()` to work on packfile storePatrick Steinhardt, Aug 21, 2025
  72. Taylor BlauAug 26, 2025
  73. Patrick SteinhardtSep 2, 2025
  74. 11/16 packfile: always add packfiles to MRU when adding a packPatrick Steinhardt, Aug 21, 2025
  75. Taylor BlauAug 27, 2025
  76. Patrick SteinhardtSep 2, 2025
  77. 12/16 packfile: introduce function to load and add packfilesPatrick Steinhardt, Aug 21, 2025
  78. Taylor BlauAug 27, 2025
  79. 13/16 packfile: move `get_multi_pack_index()` into "midx.c"Patrick Steinhardt, Aug 21, 2025
  80. Taylor BlauAug 27, 2025
  81. 14/16 packfile: remove `get_packed_git()`Patrick Steinhardt, Aug 21, 2025
  82. Taylor BlauAug 27, 2025
  83. Patrick SteinhardtSep 2, 2025
  84. Taylor BlauSep 11, 2025
  85. Patrick SteinhardtSep 15, 2025
  86. 15/16 packfile: refactor `get_all_packs()` to work on packfile storePatrick Steinhardt, Aug 21, 2025
  87. Taylor BlauAug 27, 2025
  88. Patrick SteinhardtSep 2, 2025
  89. Taylor BlauSep 11, 2025
  90. Patrick SteinhardtSep 15, 2025
  91. 16/16 packfile: refactor `get_packed_git_mru()` to work on packfile storePatrick Steinhardt, Aug 21, 2025
  92. 00/15 packfile: carve out a new packfile storePatrick Steinhardt, Sep 2, 2025
  93. 01/15 packfile: introduce a new `struct packfile_store`Patrick Steinhardt, Sep 2, 2025
  94. Karthik NayakSep 9, 2025
  95. 02/15 odb: move list of packfiles into `struct packfile_store`Patrick Steinhardt, Sep 2, 2025
  96. Karthik NayakSep 9, 2025
  97. Patrick SteinhardtSep 9, 2025
  98. 03/15 odb: move initialization bit into `struct packfile_store`Patrick Steinhardt, Sep 2, 2025
  99. 04/15 odb: move packfile map into `struct packfile_store`Patrick Steinhardt, Sep 2, 2025
  100. Karthik NayakSep 9, 2025
  101. Patrick SteinhardtSep 9, 2025
  102. 05/15 odb: move MRU list of packfiles into `struct packfile_store`Patrick Steinhardt, Sep 2, 2025
  103. 06/15 odb: move kept cache into `struct packfile_store`Patrick Steinhardt, Sep 2, 2025
  104. 07/15 packfile: reorder functions to avoid function declarationPatrick Steinhardt, Sep 2, 2025
  105. 08/15 packfile: refactor `prepare_packed_git()` to work on packfile storePatrick Steinhardt, Sep 2, 2025
  106. 09/15 packfile: split up responsibilities of `reprepare_packed_git()`Patrick Steinhardt, Sep 2, 2025
  107. 10/15 packfile: refactor `install_packed_git()` to work on packfile storePatrick Steinhardt, Sep 2, 2025
  108. 11/15 packfile: introduce function to load and add packfilesPatrick Steinhardt, Sep 2, 2025
  109. 12/15 packfile: move `get_multi_pack_index()` into "midx.c"Patrick Steinhardt, Sep 2, 2025
  110. 13/15 packfile: remove `get_packed_git()`Patrick Steinhardt, Sep 2, 2025
  111. 14/15 packfile: refactor `get_all_packs()` to work on packfile storePatrick Steinhardt, Sep 2, 2025
  112. 15/15 packfile: refactor `get_packed_git_mru()` to work on packfile storePatrick Steinhardt, Sep 2, 2025
  113. Junio C HamanoSep 2, 2025
  114. Taylor BlauSep 11, 2025
  115. Karthik NayakSep 9, 2025
  116. 00/15 packfile: carve out a new packfile storePatrick Steinhardt, Sep 9, 2025
  117. 01/15 packfile: introduce a new `struct packfile_store`Patrick Steinhardt, Sep 9, 2025
  118. 02/15 odb: move list of packfiles into `struct packfile_store`Patrick Steinhardt, Sep 9, 2025
  119. 03/15 odb: move initialization bit into `struct packfile_store`Patrick Steinhardt, Sep 9, 2025
  120. 04/15 odb: move packfile map into `struct packfile_store`Patrick Steinhardt, Sep 9, 2025
  121. 05/15 odb: move MRU list of packfiles into `struct packfile_store`Patrick Steinhardt, Sep 9, 2025
  122. 06/15 odb: move kept cache into `struct packfile_store`Patrick Steinhardt, Sep 9, 2025
  123. 07/15 packfile: reorder functions to avoid function declarationPatrick Steinhardt, Sep 9, 2025
  124. 08/15 packfile: refactor `prepare_packed_git()` to work on packfile storePatrick Steinhardt, Sep 9, 2025
  125. 09/15 packfile: split up responsibilities of `reprepare_packed_git()`Patrick Steinhardt, Sep 9, 2025
  126. 10/15 packfile: refactor `install_packed_git()` to work on packfile storePatrick Steinhardt, Sep 9, 2025
  127. 11/15 packfile: introduce function to load and add packfilesPatrick Steinhardt, Sep 9, 2025
  128. 12/15 packfile: move `get_multi_pack_index()` into "midx.c"Patrick Steinhardt, Sep 9, 2025
  129. 13/15 packfile: remove `get_packed_git()`Patrick Steinhardt, Sep 9, 2025
  130. Taylor BlauSep 11, 2025
  131. 14/15 packfile: refactor `get_all_packs()` to work on packfile storePatrick Steinhardt, Sep 9, 2025
  132. 15/15 packfile: refactor `get_packed_git_mru()` to work on packfile storePatrick Steinhardt, Sep 9, 2025
  133. Karthik NayakSep 10, 2025
  134. Taylor BlauSep 11, 2025
  135. Taylor BlauSep 11, 2025
  136. Patrick SteinhardtSep 15, 2025
  137. 00/15 packfile: carve out a new packfile storePatrick Steinhardt, Sep 15, 2025
  138. 01/15 packfile: introduce a new `struct packfile_store`Patrick Steinhardt, Sep 15, 2025
  139. Justin ToblerSep 17, 2025
  140. Patrick SteinhardtSep 23, 2025
  141. Justin ToblerSep 24, 2025
  142. 02/15 odb: move list of packfiles into `struct packfile_store`Patrick Steinhardt, Sep 15, 2025
  143. 03/15 odb: move initialization bit into `struct packfile_store`Patrick Steinhardt, Sep 15, 2025
  144. 04/15 odb: move packfile map into `struct packfile_store`Patrick Steinhardt, Sep 15, 2025
  145. Justin ToblerSep 17, 2025
  146. Patrick SteinhardtSep 23, 2025
  147. 05/15 odb: move MRU list of packfiles into `struct packfile_store`Patrick Steinhardt, Sep 15, 2025
  148. Justin ToblerSep 17, 2025
  149. 06/15 odb: move kept cache into `struct packfile_store`Patrick Steinhardt, Sep 15, 2025
  150. 07/15 packfile: reorder functions to avoid function declarationPatrick Steinhardt, Sep 15, 2025
  151. 08/15 packfile: refactor `prepare_packed_git()` to work on packfile storePatrick Steinhardt, Sep 15, 2025
  152. 09/15 packfile: split up responsibilities of `reprepare_packed_git()`Patrick Steinhardt, Sep 15, 2025
  153. Justin ToblerSep 17, 2025
  154. Patrick SteinhardtSep 23, 2025
  155. 10/15 packfile: refactor `install_packed_git()` to work on packfile storePatrick Steinhardt, Sep 15, 2025
  156. 11/15 packfile: introduce function to load and add packfilesPatrick Steinhardt, Sep 15, 2025
  157. 12/15 packfile: move `get_multi_pack_index()` into "midx.c"Patrick Steinhardt, Sep 15, 2025
  158. 13/15 packfile: refactor `get_packed_git()` to work on packfile storePatrick Steinhardt, Sep 15, 2025
  159. 14/15 packfile: refactor `get_all_packs()` to work on packfile storePatrick Steinhardt, Sep 15, 2025
  160. 15/15 packfile: refactor `get_packed_git_mru()` to work on packfile storePatrick Steinhardt, Sep 15, 2025
  161. 00/15 packfile: carve out a new packfile storePatrick Steinhardt, Sep 23, 2025
  162. 01/15 packfile: introduce a new `struct packfile_store`Patrick Steinhardt, Sep 23, 2025
  163. 02/15 odb: move list of packfiles into `struct packfile_store`Patrick Steinhardt, Sep 23, 2025
  164. 03/15 odb: move initialization bit into `struct packfile_store`Patrick Steinhardt, Sep 23, 2025
  165. 04/15 odb: move packfile map into `struct packfile_store`Patrick Steinhardt, Sep 23, 2025
  166. 05/15 odb: move MRU list of packfiles into `struct packfile_store`Patrick Steinhardt, Sep 23, 2025
  167. 06/15 odb: move kept cache into `struct packfile_store`Patrick Steinhardt, Sep 23, 2025
  168. 07/15 packfile: reorder functions to avoid function declarationPatrick Steinhardt, Sep 23, 2025
  169. 08/15 packfile: refactor `prepare_packed_git()` to work on packfile storePatrick Steinhardt, Sep 23, 2025
  170. 09/15 packfile: split up responsibilities of `reprepare_packed_git()`Patrick Steinhardt, Sep 23, 2025
  171. 10/15 packfile: refactor `install_packed_git()` to work on packfile storePatrick Steinhardt, Sep 23, 2025
  172. 11/15 packfile: introduce function to load and add packfilesPatrick Steinhardt, Sep 23, 2025
  173. 12/15 packfile: move `get_multi_pack_index()` into "midx.c"Patrick Steinhardt, Sep 23, 2025
  174. 13/15 packfile: refactor `get_packed_git()` to work on packfile storePatrick Steinhardt, Sep 23, 2025
  175. 14/15 packfile: refactor `get_all_packs()` to work on packfile storePatrick Steinhardt, Sep 23, 2025
  176. 15/15 packfile: refactor `get_packed_git_mru()` to work on packfile storePatrick Steinhardt, Sep 23, 2025
  177. Justin ToblerSep 24, 2025
  178. Junio C HamanoSep 25, 2025
  179. Patrick SteinhardtSep 26, 2025
  180. Taylor BlauSep 28, 2025
  181. Patrick SteinhardtSep 29, 2025

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