From: Jeff King <peff@peff.net>
To: Patrick Steinhardt <ps@pks.im>
Cc: git@vger.kernel.org,
Christian Couder <christian.couder@gmail.com>,
Taylor Blau <me@ttaylorr.com>
Subject: Re: [PATCH v2 7/8] pack-bitmap: implement combined filter
Date: Fri, 9 Apr 2021 11:53:11 -0400 [thread overview]
Message-ID: <YHB4ZytlI8XI+4N1@coredump.intra.peff.net> (raw)
In-Reply-To: <YHAtDp11xFzdUSQl@ncase>
On Fri, Apr 09, 2021 at 12:31:42PM +0200, Patrick Steinhardt wrote:
> > Hmm. This is essentially reproducing the list in filter_bitmap() of
> > what's OK for bitmaps. So when adding a new filter, it would have to be
> > added in both places.
> >
> > Can we preserve that property of the original code? I'd think that just
> > adding LOFC_COMBINE to filter_bitmap() would be sufficient. I.e., this
> > hunk:
> >
> > > + if (filter->choice == LOFC_COMBINE) {
> > > + int i;
> > > + for (i = 0; i < filter->sub_nr; i++) {
> > > + filter_bitmap(bitmap_git, tip_objects, to_filter,
> > > + &filter->sub[i]);
> > > + }
> > > + return 0;
> > > + }
> >
> > ...except that we need to see if filter_bitmap() returns "-1" for any of
> > the recursive calls. Which we probably should be doing anyway to
> > propagate any errors (though I think the only "errors" we'd return are
> > "not supported", at least for now).
> >
> > -Peff
>
> But wouldn't that mean that we're now needlessly filtering via bitmaps
> all the way down the combined filters only to realize at the end that it
> cannot work because we've got a tree filter with non-zero tree depth?
> Granted, this will not be the common case. But it still feels like we're
> doing needless work for cases where we know that bitmaps cannot answer
> the query.
I don't think so. We first call can_filter_bitmap(filter), which passes
NULL for bitmap_git. And then in filter_bitmap(), we only do actual work
if bitmap_git is non-NULL.
This is the same thing that saves us from even loading the bitmaps
(which is itself a non-trivial amount of work) if the filter cannot be
satisfied by bitmaps.
-Peff
next prev parent reply other threads:[~2021-04-09 15:53 UTC|newest]
Thread overview: 97+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-03-01 12:20 [PATCH 0/7] rev-parse: implement object type filter Patrick Steinhardt
2021-03-01 12:20 ` [PATCH 1/7] revision: mark commit parents as NOT_USER_GIVEN Patrick Steinhardt
2021-03-01 12:20 ` [PATCH 2/7] list-objects: move tag processing into its own function Patrick Steinhardt
2021-03-01 12:20 ` [PATCH 3/7] list-objects: support filtering by tag and commit Patrick Steinhardt
2021-03-01 12:20 ` [PATCH 4/7] list-objects: implement object type filter Patrick Steinhardt
2021-03-01 12:20 ` [PATCH 5/7] pack-bitmap: " Patrick Steinhardt
2021-03-01 12:20 ` [PATCH 6/7] pack-bitmap: implement combined filter Patrick Steinhardt
2021-03-01 12:21 ` [PATCH 7/7] rev-list: allow filtering of provided items Patrick Steinhardt
2021-03-10 21:39 ` [PATCH 0/7] rev-parse: implement object type filter Jeff King
2021-03-11 14:38 ` Patrick Steinhardt
2021-03-11 17:54 ` Jeff King
2021-03-15 11:25 ` Patrick Steinhardt
2021-03-10 21:58 ` Taylor Blau
2021-03-10 22:19 ` Jeff King
2021-03-11 14:43 ` Patrick Steinhardt
2021-03-11 17:56 ` Jeff King
2021-03-15 13:14 ` [PATCH v2 0/8] " Patrick Steinhardt
2021-03-15 13:14 ` [PATCH v2 1/8] uploadpack.txt: document implication of `uploadpackfilter.allow` Patrick Steinhardt
2021-04-06 17:17 ` Jeff King
2021-03-15 13:14 ` [PATCH v2 2/8] revision: mark commit parents as NOT_USER_GIVEN Patrick Steinhardt
2021-04-06 17:30 ` Jeff King
2021-04-09 10:19 ` Patrick Steinhardt
2021-03-15 13:14 ` [PATCH v2 3/8] list-objects: move tag processing into its own function Patrick Steinhardt
2021-04-06 17:39 ` Jeff King
2021-03-15 13:14 ` [PATCH v2 4/8] list-objects: support filtering by tag and commit Patrick Steinhardt
2021-03-15 13:14 ` [PATCH v2 5/8] list-objects: implement object type filter Patrick Steinhardt
2021-04-06 17:42 ` Jeff King
2021-03-15 13:14 ` [PATCH v2 6/8] pack-bitmap: " Patrick Steinhardt
2021-04-06 17:48 ` Jeff King
2021-03-15 13:14 ` [PATCH v2 7/8] pack-bitmap: implement combined filter Patrick Steinhardt
2021-04-06 17:54 ` Jeff King
2021-04-09 10:31 ` Patrick Steinhardt
2021-04-09 15:53 ` Jeff King [this message]
2021-04-09 11:17 ` Patrick Steinhardt
2021-04-09 15:55 ` Jeff King
2021-03-15 13:15 ` [PATCH v2 8/8] rev-list: allow filtering of provided items Patrick Steinhardt
2021-04-06 18:04 ` Jeff King
2021-04-09 10:59 ` Patrick Steinhardt
2021-04-09 15:58 ` Jeff King
2021-03-20 21:10 ` [PATCH v2 0/8] rev-parse: implement object type filter Junio C Hamano
2021-04-06 18:08 ` Jeff King
2021-04-09 11:14 ` Patrick Steinhardt
2021-04-09 16:05 ` Jeff King
2021-04-09 11:27 ` [PATCH v3 " Patrick Steinhardt
2021-04-09 11:27 ` [PATCH v3 1/8] uploadpack.txt: document implication of `uploadpackfilter.allow` Patrick Steinhardt
2021-04-09 11:27 ` [PATCH v3 2/8] revision: mark commit parents as NOT_USER_GIVEN Patrick Steinhardt
2021-04-09 11:28 ` [PATCH v3 3/8] list-objects: move tag processing into its own function Patrick Steinhardt
2021-04-09 11:28 ` [PATCH v3 4/8] list-objects: support filtering by tag and commit Patrick Steinhardt
2021-04-11 6:49 ` Junio C Hamano
2021-04-09 11:28 ` [PATCH v3 5/8] list-objects: implement object type filter Patrick Steinhardt
2021-04-09 11:28 ` [PATCH v3 6/8] pack-bitmap: " Patrick Steinhardt
2021-04-09 11:28 ` [PATCH v3 7/8] pack-bitmap: implement combined filter Patrick Steinhardt
2021-04-09 11:28 ` [PATCH v3 8/8] rev-list: allow filtering of provided items Patrick Steinhardt
2021-04-09 11:32 ` [RESEND PATCH " Patrick Steinhardt
2021-04-09 15:00 ` [PATCH " Philip Oakley
2021-04-12 13:15 ` Patrick Steinhardt
2021-04-11 6:02 ` [PATCH v3 0/8] rev-parse: implement object type filter Junio C Hamano
2021-04-12 13:12 ` Patrick Steinhardt
2021-04-12 13:37 ` [PATCH v4 0/8] rev-list: " Patrick Steinhardt
2021-04-12 13:37 ` [PATCH v4 1/8] uploadpack.txt: document implication of `uploadpackfilter.allow` Patrick Steinhardt
2021-04-12 13:37 ` [PATCH v4 2/8] revision: mark commit parents as NOT_USER_GIVEN Patrick Steinhardt
2021-04-12 13:37 ` [PATCH v4 3/8] list-objects: move tag processing into its own function Patrick Steinhardt
2021-04-12 13:37 ` [PATCH v4 4/8] list-objects: support filtering by tag and commit Patrick Steinhardt
2021-04-12 13:37 ` [PATCH v4 5/8] list-objects: implement object type filter Patrick Steinhardt
2021-04-13 9:57 ` Ævar Arnfjörð Bjarmason
2021-04-13 10:43 ` Andreas Schwab
2021-04-14 11:32 ` Patrick Steinhardt
2021-04-12 13:37 ` [PATCH v4 6/8] pack-bitmap: " Patrick Steinhardt
2021-04-12 13:37 ` [PATCH v4 7/8] pack-bitmap: implement combined filter Patrick Steinhardt
2021-04-12 13:37 ` [PATCH v4 8/8] rev-list: allow filtering of provided items Patrick Steinhardt
2021-04-13 7:45 ` [PATCH v4 0/8] rev-list: implement object type filter Jeff King
2021-04-13 8:06 ` Patrick Steinhardt
2021-04-15 9:42 ` Jeff King
2021-04-16 22:06 ` Junio C Hamano
2021-04-16 23:15 ` Junio C Hamano
2021-04-17 1:17 ` Ramsay Jones
2021-04-17 9:01 ` Jeff King
2021-04-17 21:45 ` Junio C Hamano
2021-04-13 21:03 ` Junio C Hamano
2021-04-14 11:59 ` Patrick Steinhardt
2021-04-14 21:07 ` Junio C Hamano
2021-04-15 9:57 ` Jeff King
2021-04-15 17:53 ` Junio C Hamano
2021-04-15 17:57 ` Junio C Hamano
2021-04-17 8:58 ` Jeff King
2021-04-19 11:46 ` [PATCH v5 " Patrick Steinhardt
2021-04-19 11:46 ` [PATCH v5 1/8] uploadpack.txt: document implication of `uploadpackfilter.allow` Patrick Steinhardt
2021-04-19 11:46 ` [PATCH v5 2/8] revision: mark commit parents as NOT_USER_GIVEN Patrick Steinhardt
2021-04-19 11:46 ` [PATCH v5 3/8] list-objects: move tag processing into its own function Patrick Steinhardt
2021-04-19 11:46 ` [PATCH v5 4/8] list-objects: support filtering by tag and commit Patrick Steinhardt
2021-04-19 11:46 ` [PATCH v5 5/8] list-objects: implement object type filter Patrick Steinhardt
2021-04-19 11:46 ` [PATCH v5 6/8] pack-bitmap: " Patrick Steinhardt
2021-04-19 11:47 ` [PATCH v5 7/8] pack-bitmap: implement combined filter Patrick Steinhardt
2021-04-19 11:47 ` [PATCH v5 8/8] rev-list: allow filtering of provided items Patrick Steinhardt
2021-04-19 23:16 ` [PATCH v5 0/8] rev-list: implement object type filter Junio C Hamano
2021-04-23 9:13 ` Jeff King
2021-04-28 2:18 ` Junio C Hamano
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