From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from foss.arm.com (foss.arm.com [217.140.110.172]) by smtp.subspace.kernel.org (Postfix) with ESMTP id 6C4886027C; Mon, 29 Jan 2024 11:53:32 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=217.140.110.172 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1706529214; cv=none; b=mnT/8jm0/58HfAX/GEkqGr0oWF/wSJKiYvD/CjqioWP4DHUXUp2HuAyKef123q8DhGBGlUvS61pIWoEe7KCYszihrAu0a0li7/K8se6p5pIpajQa1ZtZOFxq2sRUSxv9XrL+4fxuH1oKyJqLpARoxXMxdGNP3OgteDVx0PExZPQ= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1706529214; c=relaxed/simple; bh=9L2UF9+dZdtAdzD8GbLISbEH+QTdRBWmwSLckqatatI=; h=Date:From:To:Cc:Subject:Message-ID:References:MIME-Version: Content-Type:Content-Disposition:In-Reply-To; b=lVj1tJYvOqNOU2TwIkrzYOgKds7xRWmN5V54qQc5JIfz7tVAbuWFz3K7ph0BYNH4PrSqovUgt+DbwCjda3ReVZrRXf+23btrGtv8DMilqe2ZG6G0NA6M9n96EZEHl0K1dv9dn1B2e2GkOQJnf/qRxOZj5mwM1UmTAp23VXdPZhY= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=arm.com; spf=pass smtp.mailfrom=arm.com; arc=none smtp.client-ip=217.140.110.172 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=arm.com Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=arm.com Received: from usa-sjc-imap-foss1.foss.arm.com (unknown [10.121.207.14]) by usa-sjc-mx-foss1.foss.arm.com (Postfix) with ESMTP id BAC471FB; Mon, 29 Jan 2024 03:54:15 -0800 (PST) Received: from raptor (unknown [172.31.20.19]) by usa-sjc-imap-foss1.foss.arm.com (Postfix) with ESMTPSA id 830E13F5A1; Mon, 29 Jan 2024 03:53:26 -0800 (PST) Date: Mon, 29 Jan 2024 11:53:23 +0000 From: Alexandru Elisei To: Anshuman Khandual Cc: catalin.marinas@arm.com, will@kernel.org, oliver.upton@linux.dev, maz@kernel.org, james.morse@arm.com, suzuki.poulose@arm.com, yuzenghui@huawei.com, arnd@arndb.de, akpm@linux-foundation.org, mingo@redhat.com, peterz@infradead.org, juri.lelli@redhat.com, vincent.guittot@linaro.org, dietmar.eggemann@arm.com, rostedt@goodmis.org, bsegall@google.com, mgorman@suse.de, bristot@redhat.com, vschneid@redhat.com, mhiramat@kernel.org, rppt@kernel.org, hughd@google.com, pcc@google.com, steven.price@arm.com, vincenzo.frascino@arm.com, david@redhat.com, eugenis@google.com, kcc@google.com, hyesoo.yu@samsung.com, linux-arm-kernel@lists.infradead.org, linux-kernel@vger.kernel.org, kvmarm@lists.linux.dev, linux-fsdevel@vger.kernel.org, linux-arch@vger.kernel.org, linux-mm@kvack.org, linux-trace-kernel@vger.kernel.org Subject: Re: [PATCH RFC v3 07/35] mm: cma: Add CMA_RELEASE_{SUCCESS,FAIL} events Message-ID: References: <20240125164256.4147-1-alexandru.elisei@arm.com> <20240125164256.4147-8-alexandru.elisei@arm.com> <545bb7bd-31c7-4166-9f81-778b82ece6d4@arm.com> Precedence: bulk X-Mailing-List: linux-fsdevel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <545bb7bd-31c7-4166-9f81-778b82ece6d4@arm.com> Hi, On Mon, Jan 29, 2024 at 03:01:24PM +0530, Anshuman Khandual wrote: > > > On 1/25/24 22:12, Alexandru Elisei wrote: > > Similar to the two events that relate to CMA allocations, add the > > CMA_RELEASE_SUCCESS and CMA_RELEASE_FAIL events that count when CMA pages > > are freed. > > How is this is going to be beneficial towards analyzing CMA alloc/release > behaviour - particularly with respect to this series. OR just adding this > from parity perspective with CMA alloc side counters ? Regardless this > CMA change too could be discussed separately. Added for parity and because it's useful for this series (see my reply to the previous patch where I discuss how I've used the counters). Thanks, Alex > > > > > Signed-off-by: Alexandru Elisei > > --- > > > > Changes since rfc v2: > > > > * New patch. > > > > include/linux/vm_event_item.h | 2 ++ > > mm/cma.c | 6 +++++- > > mm/vmstat.c | 2 ++ > > 3 files changed, 9 insertions(+), 1 deletion(-) > > > > diff --git a/include/linux/vm_event_item.h b/include/linux/vm_event_item.h > > index 747943bc8cc2..aba5c5bf8127 100644 > > --- a/include/linux/vm_event_item.h > > +++ b/include/linux/vm_event_item.h > > @@ -83,6 +83,8 @@ enum vm_event_item { PGPGIN, PGPGOUT, PSWPIN, PSWPOUT, > > #ifdef CONFIG_CMA > > CMA_ALLOC_SUCCESS, > > CMA_ALLOC_FAIL, > > + CMA_RELEASE_SUCCESS, > > + CMA_RELEASE_FAIL, > > #endif > > UNEVICTABLE_PGCULLED, /* culled to noreclaim list */ > > UNEVICTABLE_PGSCANNED, /* scanned for reclaimability */ > > diff --git a/mm/cma.c b/mm/cma.c > > index dbf7fe8cb1bd..543bb6b3be8e 100644 > > --- a/mm/cma.c > > +++ b/mm/cma.c > > @@ -562,8 +562,10 @@ bool cma_release(struct cma *cma, const struct page *pages, > > { > > unsigned long pfn; > > > > - if (!cma_pages_valid(cma, pages, count)) > > + if (!cma_pages_valid(cma, pages, count)) { > > + count_vm_events(CMA_RELEASE_FAIL, count); > > return false; > > + } > > > > pr_debug("%s(page %p, count %lu)\n", __func__, (void *)pages, count); > > > > @@ -575,6 +577,8 @@ bool cma_release(struct cma *cma, const struct page *pages, > > cma_clear_bitmap(cma, pfn, count); > > trace_cma_release(cma->name, pfn, pages, count); > > > > + count_vm_events(CMA_RELEASE_SUCCESS, count); > > + > > return true; > > } > > > > diff --git a/mm/vmstat.c b/mm/vmstat.c > > index db79935e4a54..eebfd5c6c723 100644 > > --- a/mm/vmstat.c > > +++ b/mm/vmstat.c > > @@ -1340,6 +1340,8 @@ const char * const vmstat_text[] = { > > #ifdef CONFIG_CMA > > "cma_alloc_success", > > "cma_alloc_fail", > > + "cma_release_success", > > + "cma_release_fail", > > #endif > > "unevictable_pgs_culled", > > "unevictable_pgs_scanned",