From: Ramsay Jones <ramsay@ramsay1•demon.co.uk>
To: Jeff King <peff@peff•net>
Cc: Junio C Hamano <gitster@pobox•com>,
GIT Mailing-list <git@vger•kernel.org>
Subject: Re: [PATCH v3 2/2] alloc.c: remove the redundant commit_count variable
Date: Fri, 11 Jul 2014 01:59:53 +0100 [thread overview]
Message-ID: <53BF3709.6000307@ramsay1.demon.co.uk> (raw)
In-Reply-To: <20140711003053.GB11360@sigill.intra.peff.net>
On 11/07/14 01:30, Jeff King wrote:
> On Fri, Jul 11, 2014 at 12:59:48AM +0100, Ramsay Jones wrote:
>
>> The 'commit_count' static variable is used in alloc_commit_node()
>> to set the 'index' field of the commit structure to a unique value.
>> This variable assumes the same value as the 'count' field of the
>> 'commit_state' allocator state structure, which may be used in its
>> place.
>
> I don't think we want to do this, because there is a bug in the current
> code that I have not reported yet. :)
:P OK, I will simply drop this one then.
>
> The code you're touching here was trying to make sure that each commit
> gets a unique index, under the assumption that commits only get
> allocated via alloc_commit_node. But I think that assumption is wrong.
> We can also get commit objects by allocating an OBJ_NONE (e.g., via
> lookup_unknown_object) and then converting it into an OBJ_COMMIT when we
> find out what it is.
Hmm, I don't know how the object is converted, but the object allocator
is actually allocating an 'union any_object', so it's allocating more
space than for a struct object anyway. If you add an 'index' field to
struct object, (and remove it from struct commit) it could be set in
alloc_object_node(). ie _all_ node types get an index field.
Hmm, that was just off the top of my head, so take with a pinch of salt.
ATB,
Ramsay Jones
next prev parent reply other threads:[~2014-07-11 1:00 UTC|newest]
Thread overview: 35+ messages / expand[flat|nested] mbox.gz Atom feed top
2014-07-10 23:59 [PATCH v3 2/2] alloc.c: remove the redundant commit_count variable Ramsay Jones
2014-07-11 0:30 ` Jeff King
2014-07-11 0:59 ` Ramsay Jones [this message]
2014-07-11 8:32 ` Jeff King
2014-07-11 9:41 ` Ramsay Jones
2014-07-11 8:41 ` [PATCH 0/7] ensure index is set for all OBJ_COMMIT objects variable Jeff King
2014-07-11 8:42 ` [PATCH 1/7] alloc.c: remove the alloc_raw_commit_node() function Jeff King
2014-07-11 8:46 ` [PATCH 2/7] move setting of object->type to alloc_* functions Jeff King
2014-07-12 14:44 ` Ramsay Jones
2014-07-12 18:05 ` Jeff King
2014-07-13 6:41 ` Jeff King
2014-07-13 6:41 ` [PATCH v2 1/8] alloc.c: remove the alloc_raw_commit_node() function Jeff King
2014-07-15 20:06 ` Junio C Hamano
2014-07-13 6:41 ` [PATCH v2 2/8] alloc: write out allocator definitions Jeff King
2014-07-15 20:11 ` Junio C Hamano
2014-07-13 6:41 ` [PATCH v2 3/8] move setting of object->type to alloc_* functions Jeff King
2014-07-15 20:12 ` Junio C Hamano
2014-07-13 6:42 ` [PATCH v2 4/8] parse_object_buffer: do not set object type Jeff King
2014-07-13 6:42 ` [PATCH v2 5/8] add object_as_type helper for casting objects Jeff King
2014-07-13 6:42 ` [PATCH v2 6/8] alloc: factor out commit index Jeff King
2014-07-13 6:42 ` [PATCH v2 7/8] object_as_type: set " Jeff King
2014-07-13 6:42 ` [PATCH v2 8/8] diff-tree: avoid lookup_unknown_object Jeff King
2014-07-13 19:27 ` [PATCH 2/7] move setting of object->type to alloc_* functions Ramsay Jones
2014-07-14 5:57 ` Jeff King
2014-07-14 11:03 ` Ramsay Jones
2014-07-12 14:55 ` Ramsay Jones
2014-07-12 18:07 ` Jeff King
2014-07-11 8:46 ` [PATCH 3/7] parse_object_buffer: do not set object type Jeff King
2014-07-11 8:48 ` [PATCH 4/7] add object_as_type helper for casting objects Jeff King
2014-07-11 10:45 ` Ramsay Jones
2014-07-11 16:59 ` Jeff King
2014-07-11 8:48 ` [PATCH 5/7] alloc: factor out commit index Jeff King
2014-07-11 8:49 ` [PATCH 6/7] object_as_type: set " Jeff King
2014-07-11 8:50 ` [PATCH 7/7] diff-tree: avoid lookup_unknown_object Jeff King
2014-07-11 10:31 ` [PATCH 0/7] ensure index is set for all OBJ_COMMIT objects variable Ramsay Jones
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