From nobody Fri Dec 19 20:59:12 2025 Received: from e240-11.smtp-out.eu-north-1.amazonses.com (e240-11.smtp-out.eu-north-1.amazonses.com [23.251.240.11]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-SHA256 (128/128 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 803431581F0 for ; Fri, 16 May 2025 23:15:51 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=23.251.240.11 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1747437353; cv=none; b=aRS0edQbXbvJ2dnQbXR3cBoZWEd3KELtruDKM4/lqeEiUAyD3jQBvORFgoi4LZy04FwzcKOxFej+om1M+H5X6hTwULWnMrLeppM7mwJLpqduxXCT2x01V+32x/JgbLAlU7oTpCx2L7uwPRXDQZRnf7x7JInDvr552Qqg2eledbo= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1747437353; c=relaxed/simple; bh=cPvggfarQmyIci66SqtwkqSQNZt+BSso3h/As/SvT5E=; h=MIME-Version:From:Date:Message-ID:Subject:To:Cc:Content-Type; b=T3h6S5g7eDrVn5y2x60gYsts01Urm7I8mBEiBIake5o7kkzD9awqNUyNt79ABrJkwPk8KY3yDKqYXbG9QVJx732mhTNd3GMvlj0WYzywvA/cd7qwb3Lqpc2mQGk+9iFv36cvvXtQL2gMS5ZhEPKwQaLcjI254rFkeM13A4CDrd4= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=goosey.org; spf=pass smtp.mailfrom=eu-north-1.amazonses.com; dkim=pass (2048-bit key) header.d=goosey.org header.i=@goosey.org header.b=Zu4xB87s; dkim=pass (1024-bit key) header.d=amazonses.com header.i=@amazonses.com header.b=IkiUHCO6; arc=none smtp.client-ip=23.251.240.11 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=goosey.org Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=eu-north-1.amazonses.com Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=goosey.org header.i=@goosey.org header.b="Zu4xB87s"; dkim=pass (1024-bit key) header.d=amazonses.com header.i=@amazonses.com header.b="IkiUHCO6" DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/simple; s=iuunfi4kzpbzwuqjzrd5q2mr652n55fx; d=goosey.org; t=1747437349; h=MIME-Version:From:Date:Message-ID:Subject:To:Cc:Content-Type; bh=cPvggfarQmyIci66SqtwkqSQNZt+BSso3h/As/SvT5E=; b=Zu4xB87sYoCVlDImMv56Rv1PQ5dhVbaQ2yjPqhxX2AUslp6UD0C84Ump1rtOlOlP beqUbIWushOhW4N3R5867DyTnWJddh6FeFq2ttr//6pbRPSJmZso12LNDNVw4csAOff lLa6HDJk2ZLozELQW3ryOCkfZKJ4lel4Vha2pshhME0H+2iUAXmg9SQXYNG8OpukShj qKZ9R0qiZ0seRr8cajij0jTNdPBxt35jBsn+jEuEEqIGG7avtDbD2sQsW856j6p3/yz 1l8nBfWZFMcQYKHVv6zGllsKjmV8AV3r7vsyp/B1LEdOKe7aMLmDJnVmLAgaLMVnYrq dxBs72WpeA== DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/simple; s=bw45wyq3hkghdoq32obql4uyexcghmc7; d=amazonses.com; t=1747437349; h=MIME-Version:From:Date:Message-ID:Subject:To:Cc:Content-Type:Feedback-ID; bh=cPvggfarQmyIci66SqtwkqSQNZt+BSso3h/As/SvT5E=; b=IkiUHCO6gY9nVp/W/c9+FE1H5OuSOLAA+WZ9uBpkxsFjLYmj864euxBREEshqm0M mgGazQaWt96ZAWGeYSBqeIVW4yGKuZeslrQ+DeobJtXLTXzONb3zh8F1DnmKxVyAxUf CaOMgcUiIyRxiBZIt8taDK5/Y4eZALK1mFkoEZco= X-Gm-Message-State: AOJu0YztL8+8M3HgfPfTH7fP9ZYnvSNaoOmPaTwNVpMXQaswzoeD1TKo 0RRvF33HazkuYpabnYB/FD8g7IR1S76RI27u8pY5+qv06JZBml8IKSW4BOOcxEN8gvUHbNFjZXm G9vaNZk5bwb8Q7svEqUR8biVqI5Gt9tc= X-Google-Smtp-Source: AGHT+IEPcYWy16TJXz10BUaONSoxvf1D8udTQFlJh6bPU72MAnG2M2ehgw/pB1K67HIQKz4bp/55wOoqDmKNowqrFlg= X-Received: by 2002:a17:902:e786:b0:22e:5e82:66fa with SMTP id d9443c01a7336-231d450f307mr67312705ad.19.1747437347096; Fri, 16 May 2025 16:15:47 -0700 (PDT) Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 From: Ozgur Kara Date: Fri, 16 May 2025 23:15:49 +0000 X-Gmail-Original-Message-ID: X-Gm-Features: AX0GCFuTmo2oBGGIqK4gBdHsKIzDFG2M6kqJVXrSUAkJhL9lUXZrM6aADG2maug Message-ID: <01100196db61ea58-123409dc-7381-487b-91b6-166193f3f349-000000@eu-north-1.amazonses.com> Subject: [PATCH] kernel: fix acct.c first test openai codex To: Christian Brauner , Jens Axboe , Jeff Layton , Song Liu , Joel Granados Cc: linux-kernel@vger.kernel.org Feedback-ID: ::1.eu-north-1.jZlAFvO9+f8tc21Z4t7ANdAU3Nw/ALd5VHiFFAqIVOg=:AmazonSES X-SES-Outgoing: 2025.05.16-23.251.240.11 Content-Transfer-Encoding: quoted-printable Content-Type: text/plain; charset="utf-8" From: Ozgur Karatas Hello, i want to try out the openai codex and it seemed like a logical process so with rcu_read_lock() a protection is started but we dont call rcu_read_unlock(); it has to be called to end rcu read lock. I guess, this means rcu stays open forever and data structures are not cleaned which causes performance degradation. Regards Ozgur Reported-by: Ozgur Karatas --- kernel/acct.c | 1 + 1 file changed, 1 insertion(+) diff --git a/kernel/acct.c b/kernel/acct.c index 6520baa13669..8a2b75063d16 100644 --- a/kernel/acct.c +++ b/kernel/acct.c @@ -330,6 +330,7 @@ SYSCALL_DEFINE1(acct, const char __user *, name) } else { rcu_read_lock(); pin_kill(task_active_pid_ns(current)->bacct); + rcu_read_unlock(); } return error; -- 2.39.5