From nobody Thu Oct 2 15:34:44 2025 Received: from mail-pj1-f73.google.com (mail-pj1-f73.google.com [209.85.216.73]) (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 2A1C029A300 for ; Mon, 15 Sep 2025 19:52:37 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=209.85.216.73 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1757965959; cv=none; b=A7V7OQNaTqpjx0aobFiMtr7N7E0EipTshdsUrh5QUWxO//SSPYVKGfpUMvwVMi/k5TS0K5LcM9IrDDE4dCsI+R0OXrwRRkIRS1AmIeEdpZFlfTNnnc35lXx6ipqrv2Cl9bRYmfuFDhiNmWXLFj68MB2Yha7rChkGOfeNElh9Dfk= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1757965959; c=relaxed/simple; bh=E823T6HixBrikb26EDcwlUd1cuW3LPFnDlttoF3Syzw=; h=Date:In-Reply-To:Mime-Version:References:Message-ID:Subject:From: To:Cc:Content-Type; b=qxqnbbohnhrw84YnkrK+LINKA1qFIAvayd/Jx3ffuovrIHZGglInyN8cNJZCEXsKgJncNPJLHL+CunC+hLHUOXRJuyhXbeKhZNXgQFO7WzYBI+Ib7T09eIogs+dlauFuZ21Znvew9vMIBGFhmQmBqg+TVo4o+UpFpd4ns3/CrMM= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dmarc=pass (p=reject dis=none) header.from=google.com; spf=pass smtp.mailfrom=flex--fvdl.bounces.google.com; dkim=pass (2048-bit key) header.d=google.com header.i=@google.com header.b=1Ek9skAL; arc=none smtp.client-ip=209.85.216.73 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--fvdl.bounces.google.com Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=google.com header.i=@google.com header.b="1Ek9skAL" Received: by mail-pj1-f73.google.com with SMTP id 98e67ed59e1d1-324e41e946eso8237487a91.0 for ; Mon, 15 Sep 2025 12:52:37 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=google.com; s=20230601; t=1757965957; x=1758570757; 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=II5IQOV7eE0UCj316osBsFAD6qW3Vm1Z7tYAX1f0u8c=; b=1Ek9skALuvF30rujg7D7S4FZLGjsGFjZTMIW5ptcudn+AugCCRQ9aqCpEmx7fINLY0 VTiuDUDgVP7LJ+YyEAqS/JtJwLI2l/Gg8wDlEj2SMKPU6nBUTSIrZwcDU2BHJHbWUY05 N/foIrOhvhmCJU4wtwvA6RiUML22jACuMnhOs0+JMLNn+lpxA7l4FubiUxtIvtqRb4VE A1MNd7VcBAcoSivkfaTgDmcO5exen3nISr4DpjRNPeZ3fNNTw3OOKHRXs5IfhbYSw5rZ 6dj8lv1MHUWwoTHaCxoqhLDH0f7B6vn1+NcMLdcE8Tm9toU06342ry1Sjs20IKPkfpZS TT2w== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20230601; t=1757965957; x=1758570757; 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=II5IQOV7eE0UCj316osBsFAD6qW3Vm1Z7tYAX1f0u8c=; b=rUZ4pUNe6xUgfWzh7Wst3+76P2Yc2iFM+yha9a4PVRQPNqnpe1SHqhpGe+Hr0Fd3Bb 1RAr1d7ztm81xSO9CfUjQgJ6Qwarq616GWYG4b1T4RNl1i7D8/mqgdzYUJwzGQAZpD0+ 675vI2KFEOK2RDQq6HDYhhop1Y4H2aORs+ilk5/hZHMDQ5N1DD/MKCkxVVF2NQKmPNbT xk3WRbJkreErg9lPLsO2RE64/T/zDaEwaOC4dWaQSvQTqhcHc3BuNF4eMMUkNvvDl2Yw GKS6n0YYKBA5AEtRIcyxazFh2J3uLM69V2lGDxKrq+OKp33HWR/0NKl4iDsBDim1nrmb tOVA== X-Forwarded-Encrypted: i=1; AJvYcCXQoN2z00P9xOGOOGWRQEjuFhkSm/zgBd8qhuUKdhwVGc8MNAmNwZPQwD/b2yBzgKLACoG9sUW8xHvOUus=@vger.kernel.org X-Gm-Message-State: AOJu0YyZTMtmrT2Ibd/OrVDMWntnFQv+blJu7Pn1Oq1MS1fh1LjJroJV 6cR5Fk6mvBlKQ0lfcBEUGh7BPiUhMe9jbe74IJzEzDftkSGTngMzAR8KJk33kqPAKCNNhbn2GQ= = X-Google-Smtp-Source: AGHT+IFMJxaxylkV9OFVgqxO/4qqXvhUjwfCwnpPmGFdHD+wNdYJe1GQz83T1fH2gji69vii59G7U8uJ X-Received: from pjah8.prod.google.com ([2002:a17:90b:5908:b0:32d:e4c6:7410]) (user=fvdl job=prod-delivery.src-stubby-dispatcher) by 2002:a17:90b:4acf:b0:32e:685f:cce9 with SMTP id 98e67ed59e1d1-32e685fce45mr5253405a91.18.1757965957450; Mon, 15 Sep 2025 12:52:37 -0700 (PDT) Date: Mon, 15 Sep 2025 19:51:53 +0000 In-Reply-To: <20250915195153.462039-1-fvdl@google.com> Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: Mime-Version: 1.0 References: <20250915195153.462039-1-fvdl@google.com> X-Mailer: git-send-email 2.51.0.384.g4c02a37b29-goog Message-ID: <20250915195153.462039-13-fvdl@google.com> Subject: [RFC PATCH 12/12] mm/cma: add CMA balance VM event counter From: Frank van der Linden To: akpm@linux-foundation.org, muchun.song@linux.dev, linux-mm@kvack.org, linux-kernel@vger.kernel.org Cc: hannes@cmpxchg.org, david@redhat.com, roman.gushchin@linux.dev, Frank van der Linden Content-Transfer-Encoding: quoted-printable Content-Type: text/plain; charset="utf-8" Add VM counters that record the number of migration success / failures during CMA rebalancing. This is similar to other migrate counters. Signed-off-by: Frank van der Linden Reviewed-by: Rik van Riel --- include/linux/vm_event_item.h | 3 +++ mm/migrate.c | 8 ++++++++ mm/vmstat.c | 2 ++ 3 files changed, 13 insertions(+) diff --git a/include/linux/vm_event_item.h b/include/linux/vm_event_item.h index 9e15a088ba38..1711ff85a02f 100644 --- a/include/linux/vm_event_item.h +++ b/include/linux/vm_event_item.h @@ -87,6 +87,9 @@ enum vm_event_item { PGPGIN, PGPGOUT, PSWPIN, PSWPOUT, CMA_ALLOC_SUCCESS, CMA_ALLOC_FAIL, #endif + CMA_BALANCE_MIGRATE_SUCCESS, + CMA_BALANCE_MIGRATE_FAIL, + UNEVICTABLE_PGCULLED, /* culled to noreclaim list */ UNEVICTABLE_PGSCANNED, /* scanned for reclaimability */ UNEVICTABLE_PGRESCUED, /* rescued from noreclaim list */ diff --git a/mm/migrate.c b/mm/migrate.c index 9e5ef39ce73a..63d771daa3bc 100644 --- a/mm/migrate.c +++ b/mm/migrate.c @@ -2144,6 +2144,14 @@ int migrate_pages(struct list_head *from, new_folio_= t get_new_folio, count_vm_events(THP_MIGRATION_SUCCESS, stats.nr_thp_succeeded); count_vm_events(THP_MIGRATION_FAIL, stats.nr_thp_failed); count_vm_events(THP_MIGRATION_SPLIT, stats.nr_thp_split); + + if (reason =3D=3D MR_CMA_BALANCE) { + count_vm_events(CMA_BALANCE_MIGRATE_SUCCESS, + stats.nr_succeeded); + count_vm_events(CMA_BALANCE_MIGRATE_FAIL, + stats.nr_failed_pages); + } + trace_mm_migrate_pages(stats.nr_succeeded, stats.nr_failed_pages, stats.nr_thp_succeeded, stats.nr_thp_failed, stats.nr_thp_split, stats.nr_split, mode, diff --git a/mm/vmstat.c b/mm/vmstat.c index 71cd1ceba191..af811328db09 100644 --- a/mm/vmstat.c +++ b/mm/vmstat.c @@ -1392,6 +1392,8 @@ const char * const vmstat_text[] =3D { #ifdef CONFIG_CMA [I(CMA_ALLOC_SUCCESS)] =3D "cma_alloc_success", [I(CMA_ALLOC_FAIL)] =3D "cma_alloc_fail", + [I(CMA_BALANCE_MIGRATE_SUCCESS)] =3D "cma_balance_migrate_success", + [I(CMA_BALANCE_MIGRATE_FAIL)] =3D "cma_balance_migrate_fail", #endif [I(UNEVICTABLE_PGCULLED)] =3D "unevictable_pgs_culled", [I(UNEVICTABLE_PGSCANNED)] =3D "unevictable_pgs_scanned", --=20 2.51.0.384.g4c02a37b29-goog