linux-kernel - [PATCH v1 05/12] powerpc/pseries: CMM: Use adjust_managed_page_count() insted of totalram_pages

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Message-Id: <20191031142933.10779-6-david@redhat.com>
Date:   Thu, 31 Oct 2019 15:29:26 +0100
From:   David Hildenbrand <david@...hat.com>
To:     linux-kernel@...r.kernel.org
Cc:     linux-mm@...ck.org, linuxppc-dev@...ts.ozlabs.org,
        Andrew Morton <akpm@...ux-foundation.org>,
        David Hildenbrand <david@...hat.com>,
        Benjamin Herrenschmidt <benh@...nel.crashing.org>,
        Paul Mackerras <paulus@...ba.org>,
        Michael Ellerman <mpe@...erman.id.au>,
        Pavel Tatashin <pasha.tatashin@...een.com>,
        Richard Fontana <rfontana@...hat.com>,
        Allison Randal <allison@...utok.net>,
        Thomas Gleixner <tglx@...utronix.de>,
        Arun KS <arunks@...eaurora.org>
Subject: [PATCH v1 05/12] powerpc/pseries: CMM: Use adjust_managed_page_count() insted of totalram_pages_*

adjust_managed_page_count() performs a totalram_pages_add(), but also
adjust the managed pages of the zone. Let's use that instead, similar to
virtio-balloon. Use it before freeing a page.

Cc: Benjamin Herrenschmidt <benh@...nel.crashing.org>
Cc: Paul Mackerras <paulus@...ba.org>
Cc: Michael Ellerman <mpe@...erman.id.au>
Cc: Andrew Morton <akpm@...ux-foundation.org>
Cc: Pavel Tatashin <pasha.tatashin@...een.com>
Cc: Richard Fontana <rfontana@...hat.com>
Cc: Allison Randal <allison@...utok.net>
Cc: Thomas Gleixner <tglx@...utronix.de>
Cc: Arun KS <arunks@...eaurora.org>
Signed-off-by: David Hildenbrand <david@...hat.com>
---
 arch/powerpc/platforms/pseries/cmm.c | 6 +++---
 1 file changed, 3 insertions(+), 3 deletions(-)

diff --git a/arch/powerpc/platforms/pseries/cmm.c b/arch/powerpc/platforms/pseries/cmm.c
index 33d31e48ec15..f82c468ca2c4 100644
--- a/arch/powerpc/platforms/pseries/cmm.c
+++ b/arch/powerpc/platforms/pseries/cmm.c
@@ -164,7 +164,7 @@ static long cmm_alloc_pages(long nr)
 
 		list_add(&page->lru, &cmm_page_list);
 		loaned_pages++;
-		totalram_pages_dec();
+		adjust_managed_page_count(page, -1);
 		spin_unlock(&cmm_lock);
 		nr--;
 	}
@@ -191,10 +191,10 @@ static long cmm_free_pages(long nr)
 			break;
 		plpar_page_set_active(page);
 		list_del(&page->lru);
+		adjust_managed_page_count(page, 1);
 		__free_page(page);
 		loaned_pages--;
 		nr--;
-		totalram_pages_inc();
 	}
 	spin_unlock(&cmm_lock);
 	cmm_dbg("End request with %ld pages unfulfilled\n", nr);
@@ -518,10 +518,10 @@ static int cmm_mem_going_offline(void *arg)
 			continue;
 		plpar_page_set_active(page);
 		list_del(&page->lru);
+		adjust_managed_page_count(page, 1);
 		__free_page(page);
 		freed++;
 		loaned_pages--;
-		totalram_pages_inc();
 	}
 
 	spin_unlock(&cmm_lock);
-- 
2.21.0