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[106.167.137.155]) by smtp.gmail.com with ESMTPSA id d9443c01a7336-23e3b5e4792sm2565005ad.22.2025.07.17.17.50.57 (version=TLS1_3 cipher=TLS_AES_128_GCM_SHA256 bits=128/128); Thu, 17 Jul 2025 17:50:59 -0700 (PDT) Message-ID: Date: Fri, 18 Jul 2025 09:50:55 +0900 Precedence: bulk X-Mailing-List: linux-doc@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 User-Agent: Mozilla Thunderbird Subject: Re: [PATCH v2] sphinx: kernel_abi: fix performance regression with O= To: Mauro Carvalho Chehab , Linux Doc Mailing List , Jonathan Corbet Cc: linux-kernel@vger.kernel.org, Akira Yokosawa References: Content-Language: en-US From: Akira Yokosawa In-Reply-To: Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 7bit On Thu, 17 Jul 2025 13:37:19 +0200, Mauro Carvalho Chehab wrote: > The logic there which adds a dependency note to Sphinx cache > is not taking into account that the build dir may not be > the source dir. This causes a performance regression: > > $ time make O=/tmp/foo SPHINXDIRS=admin-guide htmldocs > > [OUTDATED] > Added: set() > Changed: {'abi-obsolete', 'abi-removed', 'abi-stable-files', 'abi-obsolete-files', 'abi-stable', 'abi', 'abi-removed-files', 'abi-testing-files', 'abi-testing', 'gpio/index', 'gpio/obsolete'} > Removed: set() > All docs count: 385 > Found docs count: 385 > > real 0m11,324s > user 0m15,783s > sys 0m1,164s > > To get the root cause of the problem (ABI files reported as changed), > I used this changeset: > > diff --git a/Documentation/conf.py b/Documentation/conf.py > index e8766e689c1b..ab486623bd8b 100644 > --- a/Documentation/conf.py > +++ b/Documentation/conf.py > @@ -571,3 +571,16 @@ def setup(app): > """Patterns need to be updated at init time on older Sphinx versions""" > > app.connect('config-inited', update_patterns) > + app.connect('env-get-outdated', on_outdated) > + > +def on_outdated(app, env, added, changed, removed): > + """Track cache outdated due to added/changed/removed files""" > + print("\n[OUTDATED]") > + print(f"Added: {added}") > + print(f"Changed: {changed}") > + print(f"Removed: {removed}") > + print(f"All docs count: {len(env.all_docs)}") > + print(f"Found docs count: {len(env.found_docs)}") > + > + # Just return what we have > + return added | changed | removed > > Reported-by: Akira Yokosawa > Closes: https://lore.kernel.org/linux-doc/c174f7c5-ec21-4eae-b1c3-f643cca90d9d@gmail.com/ > Signed-off-by: Mauro Carvalho Chehab Tested-by: Akira Yokosawa Thanks! > --- > v2: updated description. No changes at the diff itself > [...]