From: Junio C Hamano <gitster@pobox.com>
To: Jeff King <peff@peff.net>
Cc: git@vger.kernel.org
Subject: Re: [PATCH 3/7] release_delta_base_cache: reuse existing detach function
Date: Tue, 23 Aug 2016 14:49:15 -0700 [thread overview]
Message-ID: <xmqqwpj7tauc.fsf@gitster.mtv.corp.google.com> (raw)
In-Reply-To: <20160822215758.uamavr7koin3ze6c@sigill.intra.peff.net> (Jeff King's message of "Mon, 22 Aug 2016 17:57:58 -0400")
Jeff King <peff@peff.net> writes:
> This function drops an entry entirely from the cache,
> meaning that aside from the freeing of the buffer, it is
> exactly equivalent to detach_delta_base_cache_entry(). Let's
> build on top of the detach function, which shortens the code
> and will make it simpler when we change out the underlying
> storage in future patches.
>
> Signed-off-by: Jeff King <peff@peff.net>
> ---
> sha1_file.c | 5 +----
> 1 file changed, 1 insertion(+), 4 deletions(-)
>
> diff --git a/sha1_file.c b/sha1_file.c
> index 1d0810c..8264b39 100644
> --- a/sha1_file.c
> +++ b/sha1_file.c
> @@ -2152,10 +2152,7 @@ static inline void release_delta_base_cache(struct delta_base_cache_entry *ent)
> {
> if (ent->data) {
> free(ent->data);
> - ent->data = NULL;
> - ent->lru.next->prev = ent->lru.prev;
> - ent->lru.prev->next = ent->lru.next;
> - delta_base_cached -= ent->size;
> + detach_delta_base_cache_entry(ent);
If we were designing this from scratch, we might have made detach_*
to return the pointer to minimize direct access to ent->data, but I
do not think it is worth it. Looks very sensible.
next prev parent reply other threads:[~2016-08-23 21:49 UTC|newest]
Thread overview: 17+ messages / expand[flat|nested] mbox.gz Atom feed top
2016-08-22 21:57 [PATCH 0/7] tweaking the delta base cache Jeff King
2016-08-22 21:57 ` [PATCH 1/7] cache_or_unpack_entry: drop keep_cache parameter Jeff King
2016-08-23 21:45 ` Junio C Hamano
2016-08-22 21:57 ` [PATCH 2/7] clear_delta_base_cache_entry: use a more descriptive name Jeff King
2016-08-23 21:47 ` Junio C Hamano
2016-08-22 21:57 ` [PATCH 3/7] release_delta_base_cache: reuse existing detach function Jeff King
2016-08-23 21:49 ` Junio C Hamano [this message]
2016-08-24 17:41 ` Jeff King
2016-08-24 17:59 ` Junio C Hamano
2016-08-22 21:59 ` [PATCH 4/7] delta_base_cache: use list.h for LRU Jeff King
2016-08-22 23:18 ` Eric Wong
2016-08-23 0:48 ` Jeff King
2016-08-22 21:59 ` [PATCH 5/7] delta_base_cache: drop special treatment of blobs Jeff King
2016-08-23 22:18 ` Junio C Hamano
2016-08-22 22:00 ` [PATCH 6/7] delta_base_cache: use hashmap.h Jeff King
2016-08-23 22:26 ` Junio C Hamano
2016-08-22 22:01 ` [PATCH 7/7] t/perf: add basic perf tests for delta base cache Jeff King
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