From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from mail-pl1-f202.google.com (mail-pl1-f202.google.com [209.85.214.202]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-GCM-SHA256 (128/128 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id B128B18A6CF for ; Thu, 26 Dec 2024 21:16:44 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=209.85.214.202 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1735247806; cv=none; b=Ly5UiOPH7q+YSzGbb1ogqa4rkpZQ2qvquiEGxylf+zFiYoX69QY+6kx9tlH2SXu+N2lKZOhZ4O3Bfc7HTBExJXjl1ZPEfrACDtYO2wdJn1ccx3yD4W0zsbB1zs+knlJZu8xLA1TM5oMhL66ScTHM9eIqt7a01HKGLvCVKQUUTCI= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1735247806; c=relaxed/simple; bh=0Vz0NIwoGlPJliaqwoFyHwwhZ47+H56/giuVcAlhyf4=; h=Date:In-Reply-To:Mime-Version:References:Message-ID:Subject:From: To:Cc:Content-Type; b=SmJSCxR6/kVVtI57WxhCNKDgcmvkn6TRWp1gXKv3aMFD7NNm3+HUMgDHNWY7AMYMRr+hP4UD++SmRUZuXSoRDVe/5H8dOGkYtn5fNt1PHxLwauqQuUKCixRI8nBlD711i6YAgr3E+mkAPuSjck4I0Od23cbVftko4Qhk90Q0zag= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dmarc=pass (p=reject dis=none) header.from=google.com; spf=pass smtp.mailfrom=flex--surenb.bounces.google.com; dkim=pass (2048-bit key) header.d=google.com header.i=@google.com header.b=khbiYrkO; arc=none smtp.client-ip=209.85.214.202 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=reject dis=none) header.from=google.com Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=flex--surenb.bounces.google.com Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=google.com header.i=@google.com header.b="khbiYrkO" Received: by mail-pl1-f202.google.com with SMTP id d9443c01a7336-2166f9f52fbso135220495ad.2 for ; Thu, 26 Dec 2024 13:16:44 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=google.com; s=20230601; t=1735247804; x=1735852604; darn=vger.kernel.org; h=cc:to:from:subject:message-id:references:mime-version:in-reply-to :date:from:to:cc:subject:date:message-id:reply-to; bh=pfuXd0GrahP2NIiXLpGEz1njL3PbfzffRJS1JIIbtb4=; b=khbiYrkOkNU1Np+lvgaZh/WbNo+r3w5FAyxSMcHc+5jzhbkFEMTEB4AnowB3EtzE7x AcaNJMmC40jWe6H01mVliRZ5o7006Huy2quHX59T3tRCj2jy+v0RD58cFWbMBOVGYS1S 3WkqkPGzqk1+6y5uwI4Wu6Z6LYQGavgDyPiUiAycZXJoVEAZ118S01ZcvNLypR3Z3tV9 045LIjDnP2aaxp+/a+QJqVAwzOhPc5/pzv8qgc8RL05j9kSgWEImHrnGdmgk6HU/RC6m 9Dp4plL4oo7KRVuM0fNlniTSlowyzE5OXuPfn6rtgk+O2mUu6gttB3b+v8qvgDmLYOiL DSlQ== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20230601; t=1735247804; x=1735852604; h=cc:to:from:subject:message-id:references:mime-version:in-reply-to :date:x-gm-message-state:from:to:cc:subject:date:message-id:reply-to; bh=pfuXd0GrahP2NIiXLpGEz1njL3PbfzffRJS1JIIbtb4=; b=Sa52fNUjYfY098yv/POxxQlyBi66UQBUYw6SHECskXSuWEPWHc9q6L8moOY2l0n8/q slsL6haJkT9tiGFeVWk/6ae4xDjjjZOy1zYz60RUSuAV1bKGK+7T07w0jI0Mh6l1rz+N a1iaIiYsIBsCfpnOlr/EoSvSv0wfgMDVbYt2PesF+4fmYLeqJ778zolCy8zwchm90k2B mMMriIIPivB2HbnKiU9AtAxr7SEf+K3sIA4oHUIjun5wjZ15emIermHtOD/J7YxQwHzl AAXF3qnj10Qu7bkSwEtsxmgmLlOW9wFm+GWLUxKedMcRUSTtxio482M/DH0YP/CYj3SN JaEA== X-Forwarded-Encrypted: i=1; AJvYcCU2J27iN4fKvknu1JFdVHdhVKzBjHg78laqeXQq0ko2AeD/aGo3xCVVc75FO1dfnU6MRt20EB1kMz078D8=@vger.kernel.org X-Gm-Message-State: AOJu0YxrEN1A35RqPdiWFHAjraA8XPfgi19ccAAAZJ9nkhI1TUFS1B+/ /o1+Kvi6iVF9Ju0DacPXoGyiT7LKJd2mj+ti6rSBrrUxvit0IH4hKCBlLNohe/iX1jJRoHiWy55 p0w== X-Google-Smtp-Source: AGHT+IG8zt0lLXNRNgHLYZTdR0wBOYsPANFDIrRsTRrEqiRTBTz8an+nFbGCK3hSlS4zlLagTqqkdmVyqFw= X-Received: from pgbcq3.prod.google.com ([2002:a05:6a02:4083:b0:7fd:50ab:dc45]) (user=surenb job=prod-delivery.src-stubby-dispatcher) by 2002:a17:902:ce0e:b0:216:3d72:1712 with SMTP id d9443c01a7336-219e6f38292mr386695025ad.48.1735247804120; Thu, 26 Dec 2024 13:16:44 -0800 (PST) Date: Thu, 26 Dec 2024 13:16:39 -0800 In-Reply-To: <20241226211639.1357704-1-surenb@google.com> Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: Mime-Version: 1.0 References: <20241226211639.1357704-1-surenb@google.com> X-Mailer: git-send-email 2.47.1.613.gc27f4b7a9f-goog Message-ID: <20241226211639.1357704-2-surenb@google.com> Subject: [PATCH 2/2] alloc_tag: skip pgalloc_tag_swap if profiling is disabled From: Suren Baghdasaryan To: akpm@linux-foundation.org Cc: kent.overstreet@linux.dev, yuzhao@google.com, 00107082@163.com, quic_zhenhuah@quicinc.com, linux-mm@kvack.org, linux-kernel@vger.kernel.org, Suren Baghdasaryan , stable@vger.kernel.org Content-Type: text/plain; charset="UTF-8" When memory allocation profiling is disabled, there is no need to swap allocation tags during migration. Skip it to avoid unnecessary overhead. Fixes: e0a955bf7f61 ("mm/codetag: add pgalloc_tag_copy()") Signed-off-by: Suren Baghdasaryan Cc: stable@vger.kernel.org --- lib/alloc_tag.c | 3 +++ 1 file changed, 3 insertions(+) diff --git a/lib/alloc_tag.c b/lib/alloc_tag.c index 4c373f444eb1..4e5d7af3eaa2 100644 --- a/lib/alloc_tag.c +++ b/lib/alloc_tag.c @@ -197,6 +197,9 @@ void pgalloc_tag_swap(struct folio *new, struct folio *old) union codetag_ref ref_old, ref_new; struct alloc_tag *tag_old, *tag_new; + if (!mem_alloc_profiling_enabled()) + return; + tag_old = pgalloc_tag_get(&old->page); if (!tag_old) return; -- 2.47.1.613.gc27f4b7a9f-goog