git@vger.kernel.org mailing list mirror (one of many)
 help / color / mirror / code / Atom feed
From: Duy Nguyen <pclouds@gmail.com>
To: Elijah Newren <newren@gmail.com>
Cc: Thomas Gummerer <t.gummerer@gmail.com>,
	Git Mailing List <git@vger.kernel.org>,
	Junio C Hamano <gitster@pobox.com>
Subject: Re: [PATCH 4/8] read-cache: add invalidate parameter to remove_marked_cache_entries
Date: Mon, 10 Dec 2018 19:19:21 +0100	[thread overview]
Message-ID: <CACsJy8BG5ri=UMeOPqLTqxcOYqPsc9BdY4pxgQA8pfb+rE1MyA@mail.gmail.com> (raw)
In-Reply-To: <CABPp-BEkeRa7jOkDcNNpZMY9J9JmNGtMKjZeNv8i_u7jUFihcw@mail.gmail.com>

On Mon, Dec 10, 2018 at 7:09 PM Elijah Newren <newren@gmail.com> wrote:
> > > For the two current callsites, unpack-trees seems to do this
> > > invalidation itself internally.
> >
> > I'm still a bit scared of this invalidation business in unpack-trees.
> > The thing is, we handle two separate index_state there, src_index and
> > result and invalidation has to be done on the right one (because index
> > extensions are on src_index until the very end of unpack-trees;
> > invalidating on 'result' would be no-op and wrong).
> > remove_marked_cache_entries() seems to be called on 'result' while
> > invalidate_ce_path() is on src_index, hm....
>
> Is Thomas avoiding problems here simply because merge is the only
> caller of unpack_trees with src_index != dst_index?  Or does src_index
> == dst_index for checkout not actually help?

I think it would not help. 'result' is a temporary index where we copy
things to (and it does not have anything from the beginning). If you
invalidate stuff in there, you invalidate nothing, regardless whether
dst_index == src_index.

> If that does help with the checkout case, then allow me to find a
> different way to muddy the waters...  I think I might want to make use
> of this function in the merge machinery at some point, so I either
> need to figure out how to convince you to verify if all this cache
> tree invalidation stuff is sane, or somehow figure out all the
> cache_tree stuff stuff myself so I can figure out what is right here.
> :-)

I'm not the unpack-trees man (I think that would still be Junio). And
I'm not saying it's sane either. I think it's just some leftover
things since Linus split "the index" in unpack-tree operation to
'src', 'result' and 'dst' many years ago and nobody was brave enough
to clean it up (then I piled on with untracked cache and split index,
but I did not see it clearly either). That person could be you ;-)
-- 
Duy

  reply	other threads:[~2018-12-10 18:19 UTC|newest]

Thread overview: 115+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2018-12-09 20:04 [PATCH 0/8] introduce no-overlay and cached mode in git checkout Thomas Gummerer
2018-12-09 20:04 ` [PATCH 1/8] move worktree tests to t24* Thomas Gummerer
2018-12-10  3:48   ` Junio C Hamano
2018-12-10 15:32   ` Duy Nguyen
2018-12-11 21:50     ` Thomas Gummerer
2018-12-12 13:26       ` Eric Sunshine
2018-12-12 17:07         ` Duy Nguyen
2018-12-09 20:04 ` [PATCH 2/8] entry: factor out unlink_entry function Thomas Gummerer
2018-12-10 15:49   ` Duy Nguyen
2018-12-10 17:23     ` Elijah Newren
2018-12-10 17:27       ` Duy Nguyen
2018-12-11  2:23     ` Junio C Hamano
2018-12-20 13:36     ` Thomas Gummerer
2018-12-09 20:04 ` [PATCH 3/8] entry: support CE_WT_REMOVE flag in checkout_entry Thomas Gummerer
2018-12-10 15:58   ` Duy Nguyen
2018-12-11  2:28     ` Junio C Hamano
2018-12-12  6:16       ` Duy Nguyen
2018-12-12  7:36         ` Junio C Hamano
2018-12-10 17:49   ` Elijah Newren
2018-12-11 22:00     ` Thomas Gummerer
2018-12-09 20:04 ` [PATCH 4/8] read-cache: add invalidate parameter to remove_marked_cache_entries Thomas Gummerer
2018-12-10 16:08   ` Duy Nguyen
2018-12-10 18:09     ` Elijah Newren
2018-12-10 18:19       ` Duy Nguyen [this message]
2018-12-10 18:25         ` Elijah Newren
2018-12-10 18:33           ` Duy Nguyen
2018-12-10 18:47             ` Elijah Newren
2018-12-11 21:59       ` Thomas Gummerer
2018-12-11  2:42     ` Junio C Hamano
2018-12-09 20:04 ` [PATCH 5/8] checkout: introduce --{,no-}overlay option Thomas Gummerer
2018-12-10 16:42   ` Duy Nguyen
2018-12-11 22:42     ` Thomas Gummerer
2018-12-10 18:19   ` Elijah Newren
2018-12-11  3:07     ` Junio C Hamano
2018-12-11  6:04       ` Elijah Newren
2018-12-11 22:07       ` Thomas Gummerer
2018-12-09 20:04 ` [PATCH 6/8] checkout: add --cached option Thomas Gummerer
2018-12-10 16:49   ` Duy Nguyen
2018-12-11  3:13     ` Junio C Hamano
2018-12-11  6:12       ` Elijah Newren
2018-12-11 19:23         ` Duy Nguyen
2019-01-31  5:54           ` Duy Nguyen
2019-01-31 19:05             ` Junio C Hamano
2019-02-01  6:48               ` Duy Nguyen
2019-02-01 17:57                 ` Junio C Hamano
2019-02-02 10:57                   ` Duy Nguyen
2019-02-19  4:20                   ` Duy Nguyen
2019-02-19 14:42                     ` Elijah Newren
2019-02-19 14:57                       ` Duy Nguyen
2019-02-19 19:07                       ` Junio C Hamano
2019-02-19 22:24                         ` Elijah Newren
2019-02-19 22:36                           ` Junio C Hamano
2019-02-19 23:00                             ` Elijah Newren
2019-02-20  1:53                             ` Duy Nguyen
2019-02-19 19:02                     ` Junio C Hamano
2019-02-19 19:10                       ` Junio C Hamano
2019-02-19 22:04                         ` Elijah Newren
2019-02-19 22:29                           ` Junio C Hamano
2019-02-20  2:32                             ` Duy Nguyen
2019-02-20  3:52                           ` Duy Nguyen
2019-02-20  2:19                         ` Duy Nguyen
2019-02-19 22:13                       ` Elijah Newren
2019-02-19 22:33                         ` Junio C Hamano
2018-12-10 18:42   ` Elijah Newren
2018-12-11 22:18     ` Thomas Gummerer
2018-12-09 20:04 ` [PATCH 7/8] checkout: allow ignoring unmatched pathspec Thomas Gummerer
2018-12-10 16:51   ` Duy Nguyen
2018-12-11 22:23     ` Thomas Gummerer
2018-12-10 20:25   ` Elijah Newren
2018-12-11 22:36     ` Thomas Gummerer
2018-12-09 20:04 ` [PATCH 8/8] stash: use git checkout --no-overlay Thomas Gummerer
2018-12-10 20:26   ` Elijah Newren
2018-12-10  3:47 ` [PATCH 0/8] introduce no-overlay and cached mode in git checkout Junio C Hamano
2018-12-20  8:43   ` Thomas Gummerer
2018-12-10 17:06 ` Duy Nguyen
2018-12-10 17:18 ` Elijah Newren
2018-12-10 18:37   ` Duy Nguyen
2018-12-11 22:52   ` Thomas Gummerer
2018-12-12  7:28     ` Junio C Hamano
2018-12-20 13:48 ` [PATCH v2 0/8] introduce no-overlay " Thomas Gummerer
2018-12-20 13:48   ` [PATCH v2 1/8] move worktree tests to t24* Thomas Gummerer
2018-12-20 13:48   ` [PATCH v2 2/8] entry: factor out unlink_entry function Thomas Gummerer
2018-12-20 13:48   ` [PATCH v2 3/8] entry: support CE_WT_REMOVE flag in checkout_entry Thomas Gummerer
2018-12-20 13:48   ` [PATCH v2 4/8] read-cache: add invalidate parameter to remove_marked_cache_entries Thomas Gummerer
2018-12-20 13:48   ` [PATCH v2 5/8] checkout: clarify comment Thomas Gummerer
2018-12-20 13:48   ` [PATCH v2 6/8] checkout: factor out mark_cache_entry_for_checkout function Thomas Gummerer
2018-12-20 13:48   ` [PATCH v2 7/8] checkout: introduce --{,no-}overlay option Thomas Gummerer
2018-12-23  8:05     ` Duy Nguyen
2018-12-23  9:44       ` Eric Sunshine
2019-01-06 18:18         ` Thomas Gummerer
2018-12-20 13:48   ` [PATCH v2 8/8] checkout: introduce checkout.overlayMode config Thomas Gummerer
2019-01-02 23:39     ` Junio C Hamano
2019-01-06 18:32       ` Thomas Gummerer
2019-01-07 17:00         ` Junio C Hamano
2019-01-08 21:52   ` [PATCH v3 0/8] introduce no-overlay mode in git checkout Thomas Gummerer
2019-01-08 21:52     ` [PATCH v3 1/8] move worktree tests to t24* Thomas Gummerer
2019-01-08 21:52     ` [PATCH v3 2/8] entry: factor out unlink_entry function Thomas Gummerer
2019-01-08 21:52     ` [PATCH v3 3/8] entry: support CE_WT_REMOVE flag in checkout_entry Thomas Gummerer
2019-01-08 21:52     ` [PATCH v3 4/8] read-cache: add invalidate parameter to remove_marked_cache_entries Thomas Gummerer
2019-01-08 21:52     ` [PATCH v3 5/8] checkout: clarify comment Thomas Gummerer
2019-01-08 21:52     ` [PATCH v3 6/8] checkout: factor out mark_cache_entry_for_checkout function Thomas Gummerer
2019-01-08 21:52     ` [PATCH v3 7/8] checkout: introduce --{,no-}overlay option Thomas Gummerer
2019-01-22 23:53       ` Jonathan Nieder
2019-01-23 19:05         ` Junio C Hamano
2019-01-23 20:21         ` Thomas Gummerer
2019-01-23 20:47           ` Jonathan Nieder
2019-01-24 22:08             ` Thomas Gummerer
2019-01-23 21:08           ` Junio C Hamano
2019-01-24  1:12             ` Jonathan Nieder
2019-01-24 22:02               ` Thomas Gummerer
2019-01-24 23:02               ` Junio C Hamano
2019-01-25  2:26                 ` Jonathan Nieder
2019-01-25  9:24                   ` Duy Nguyen
2019-02-09 18:54               ` Philip Oakley
2019-01-08 21:52     ` [PATCH v3 8/8] checkout: introduce checkout.overlayMode config Thomas Gummerer

Reply instructions:

You may reply publicly to this message via plain-text email
using any one of the following methods:

* Save the following mbox file, import it into your mail client,
  and reply-to-all from there: mbox

  Avoid top-posting and favor interleaved quoting:
  https://en.wikipedia.org/wiki/Posting_style#Interleaved_style

  List information: http://vger.kernel.org/majordomo-info.html

* Reply using the --to, --cc, and --in-reply-to
  switches of git-send-email(1):

  git send-email \
    --in-reply-to='CACsJy8BG5ri=UMeOPqLTqxcOYqPsc9BdY4pxgQA8pfb+rE1MyA@mail.gmail.com' \
    --to=pclouds@gmail.com \
    --cc=git@vger.kernel.org \
    --cc=gitster@pobox.com \
    --cc=newren@gmail.com \
    --cc=t.gummerer@gmail.com \
    /path/to/YOUR_REPLY

  https://kernel.org/pub/software/scm/git/docs/git-send-email.html

* If your mail client supports setting the In-Reply-To header
  via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line before the message body.
Code repositories for project(s) associated with this public inbox

	https://80x24.org/mirrors/git.git

This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox;
as well as URLs for read-only IMAP folder(s) and NNTP newsgroup(s).