From mboxrd@z Thu Jan 1 00:00:00 1970 From: =?UTF-8?q?Nguy=E1=BB=85n=20Th=C3=A1i=20Ng=E1=BB=8Dc=20Duy?= Subject: [PATCH v3 07/23] untracked cache: mark what dirs should be recursed/saved Date: Mon, 8 Dec 2014 21:04:51 +0700 Message-ID: <1418047507-22892-9-git-send-email-pclouds@gmail.com> References: <1418047507-22892-1-git-send-email-pclouds@gmail.com> Mime-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: QUOTED-PRINTABLE Cc: =?UTF-8?q?Nguy=E1=BB=85n=20Th=C3=A1i=20Ng=E1=BB=8Dc=20Duy?= To: git@vger.kernel.org X-From: git-owner@vger.kernel.org Mon Dec 08 14:55:40 2014 Return-path: Envelope-to: gcvg-git-2@plane.gmane.org Received: from vger.kernel.org ([209.132.180.67]) by plane.gmane.org with esmtp (Exim 4.69) (envelope-from ) id 1Xxymk-0004Tk-Er for gcvg-git-2@plane.gmane.org; Mon, 08 Dec 2014 14:55:34 +0100 Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1755487AbaLHNz0 convert rfc822-to-quoted-printable (ORCPT ); Mon, 8 Dec 2014 08:55:26 -0500 Received: from mail-pa0-f51.google.com ([209.85.220.51]:45619 "EHLO mail-pa0-f51.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1753229AbaLHNzX (ORCPT ); Mon, 8 Dec 2014 08:55:23 -0500 Received: by mail-pa0-f51.google.com with SMTP id ey11so5239500pad.24 for ; Mon, 08 Dec 2014 05:55:23 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20120113; h=from:to:cc:subject:date:message-id:in-reply-to:references :mime-version:content-type:content-transfer-encoding; bh=iSSIcD/VdiBEYB2ic6E6xt7l0GntSrmY1/+D3pyT9os=; b=Eq8WhJrH6gS9ZMdVMyfe807rRSdu/9X0Dz+FzbGCr5qhRmIiwzAhIdixGmXoLRw0TK qIhtD67MFqcusikdTkq8rzHiT7c/kpFxZgGXGTmNiRP0PXOF89elxiV5l1st6cAp4+Ob MCvnDL4pRw88m+HOQNO/gCplRmRNwZ0lP1gtyyfFtoVB6ifPEgtlXxuiJEVbS56LmGmv gsir4gpU7drkVEhMpqoVm2g7WHaul322lj7ZXS9CH+YEqaVQs/x5Q7WmhZiQ/ULRX8RN 7wnYQO04xqXr3evdHGopE7W9fWqxX9jE/ypRmkaL+d0RFONir7V8QXJRGAqSOMoNnsaR 6L0g== X-Received: by 10.66.159.3 with SMTP id wy3mr53008603pab.98.1418046923347; Mon, 08 Dec 2014 05:55:23 -0800 (PST) Received: from lanh ([115.73.205.130]) by mx.google.com with ESMTPSA id gm11sm36383111pbd.63.2014.12.08.05.55.20 for (version=TLSv1.2 cipher=ECDHE-RSA-AES128-GCM-SHA256 bits=128/128); Mon, 08 Dec 2014 05:55:22 -0800 (PST) Received: by lanh (sSMTP sendmail emulation); Mon, 08 Dec 2014 21:05:58 +0700 X-Mailer: git-send-email 2.2.0.60.gb7b3c64 In-Reply-To: <1418047507-22892-1-git-send-email-pclouds@gmail.com> Sender: git-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: git@vger.kernel.org Archived-At: If we redo this thing in a functional style, we would have one struct untracked_dir as input tree and another as output. The input is used for verification. The output is a brand new tree, reflecting current worktree. But that means recreate a lot of dir nodes even if a lot could be shared between input and output trees in good cases. So we go with the messy but efficient way, combining both input and output trees into one. We need a way to know which node in this combined tree belongs to the output. This is the purpose of this "recurse" flag. "valid" bit can't be used for this because it's about data of the node except the subdirs. When we invalidate a directory, we want to keep cached data of the subdirs intact even though we don't really know what subdir still exists (yet). Then we check worktree to see what actual subdir remains on disk. Those will have 'recurse' bit set again. If cached data for those are still valid, we may be able to avoid computing exclude files for them. Those subdirs that are deleted will have 'recurse' remained clear and their 'valid' bits do not matter. Signed-off-by: Nguy=E1=BB=85n Th=C3=A1i Ng=E1=BB=8Dc Duy --- dir.c | 14 +++++++++++++- dir.h | 3 ++- 2 files changed, 15 insertions(+), 2 deletions(-) diff --git a/dir.c b/dir.c index 8c989e3..02cdc26 100644 --- a/dir.c +++ b/dir.c @@ -615,9 +615,12 @@ static void invalidate_gitignore(struct untracked_= cache *uc, static void invalidate_directory(struct untracked_cache *uc, struct untracked_cache_dir *dir) { + int i; uc->dir_invalidated++; dir->valid =3D 0; dir->untracked_nr =3D 0; + for (i =3D 0; i < dir->dirs_nr; i++) + dir->dirs[i]->recurse =3D 0; } =20 /* @@ -1577,6 +1580,10 @@ static int read_cached_dir(struct cached_dir *cd= ir) } while (cdir->nr_dirs < cdir->untracked->dirs_nr) { struct untracked_cache_dir *d =3D cdir->untracked->dirs[cdir->nr_dir= s]; + if (!d->recurse) { + cdir->nr_dirs++; + continue; + } cdir->ucd =3D d; cdir->nr_dirs++; return 0; @@ -1598,8 +1605,10 @@ static void close_cached_dir(struct cached_dir *= cdir) * We have gone through this directory and found no untracked * entries. Mark it valid. */ - if (cdir->untracked) + if (cdir->untracked) { cdir->untracked->valid =3D 1; + cdir->untracked->recurse =3D 1; + } } =20 /* @@ -1842,6 +1851,9 @@ static struct untracked_cache_dir *validate_untra= cked_cache(struct dir_struct *d invalidate_gitignore(dir->untracked, root); dir->untracked->ss_excludes_file =3D dir->ss_excludes_file; } + + /* Make sure this directory is not dropped out at saving phase */ + root->recurse =3D 1; return root; } =20 diff --git a/dir.h b/dir.h index ff3d99b..95baf01 100644 --- a/dir.h +++ b/dir.h @@ -115,8 +115,9 @@ struct untracked_cache_dir { unsigned int untracked_alloc, dirs_nr, dirs_alloc; unsigned int untracked_nr; unsigned int check_only : 1; - /* all data in this struct are good */ + /* all data except 'dirs' in this struct are good */ unsigned int valid : 1; + unsigned int recurse : 1; /* null SHA-1 means this directory does not have .gitignore */ unsigned char exclude_sha1[20]; char name[FLEX_ARRAY]; --=20 2.2.0.60.gb7b3c64