From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from bombadil.infradead.org (bombadil.infradead.org [198.137.202.133]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.lore.kernel.org (Postfix) with ESMTPS id 219F2C47DA9 for ; Mon, 29 Jan 2024 11:53:45 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=lists.infradead.org; s=bombadil.20210309; h=Sender: Content-Transfer-Encoding:Content-Type:List-Subscribe:List-Help:List-Post: List-Archive:List-Unsubscribe:List-Id:In-Reply-To:MIME-Version:References: Message-ID:Subject:Cc:To:From:Date:Reply-To:Content-ID:Content-Description: Resent-Date:Resent-From:Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID: List-Owner; bh=Dj4I/cM0O0eLXXR2W3B1gAYWqR3al0j+8UtldiENP9M=; b=mmaqZ7Mfj93Ma0 bGmv4T0HteLolxMJ3U02p1Agq0iRlYN4WRBBHHVusmIUQeaOuR6pemknz5t59n40AhpJbSKqq6rCX Xpsjjf4q8swwWhpqIjyHpqa3F3LH5VX1j8PgyYr1CZ34FYA5iczPMvrg4DAxrqhAH3y7vUKorOcCw ejetXrY7TR8XMkCMBnNhAzW/5kFf8EqvInn8texzH0Ex8JbbRFK6wl2TXryh9uVSTk93j9nrJCbhi U9e3KzsZyrce7WHABaNphfmaKe8w6XUGTA7+X0vUFJxvdpqQ88OLGWsapIDUdk8y5TE8XyJ5WOqyp mEdDmhXPDCMxngyKOPrA==; Received: from localhost ([::1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.97.1 #2 (Red Hat Linux)) id 1rUQCm-0000000CTdl-0Apf; Mon, 29 Jan 2024 11:53:36 +0000 Received: from foss.arm.com ([217.140.110.172]) by bombadil.infradead.org with esmtp (Exim 4.97.1 #2 (Red Hat Linux)) id 1rUQCj-0000000CTbq-2MQp for linux-arm-kernel@lists.infradead.org; Mon, 29 Jan 2024 11:53:35 +0000 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> MIME-Version: 1.0 Content-Disposition: inline In-Reply-To: <545bb7bd-31c7-4166-9f81-778b82ece6d4@arm.com> X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20240129_035333_766454_84F9A6E3 X-CRM114-Status: GOOD ( 20.22 ) X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.34 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+linux-arm-kernel=archiver.kernel.org@lists.infradead.org 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", _______________________________________________ linux-arm-kernel mailing list linux-arm-kernel@lists.infradead.org http://lists.infradead.org/mailman/listinfo/linux-arm-kernel