linux-kernel - [PATCH V7 5/5] testing

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Date:   Mon, 14 Jan 2019 15:24:38 +0530
From:   "Aneesh Kumar K.V" <aneesh.kumar@...ux.ibm.com>
To:     akpm@...ux-foundation.org, Michal Hocko <mhocko@...nel.org>,
        Alexey Kardashevskiy <aik@...abs.ru>,
        David Gibson <david@...son.dropbear.id.au>,
        Andrea Arcangeli <aarcange@...hat.com>, mpe@...erman.id.au
Cc:     linux-mm@...ck.org, linux-kernel@...r.kernel.org,
        linuxppc-dev@...ts.ozlabs.org,
        "Aneesh Kumar K.V" <aneesh.kumar@...ux.ibm.com>
Subject: [PATCH V7 5/5] testing

---
 mm/gup.c | 6 ++++--
 1 file changed, 4 insertions(+), 2 deletions(-)

diff --git a/mm/gup.c b/mm/gup.c
index 6e8152594e83..91849c39931a 100644
--- a/mm/gup.c
+++ b/mm/gup.c
@@ -1226,7 +1226,7 @@ static long check_and_migrate_cma_pages(unsigned long start, long nr_pages,
 		 * be pinning these entries, we might as well move them out
 		 * of the CMA zone if possible.
 		 */
-		if (is_migrate_cma_page(pages[i])) {
+		if (true || is_migrate_cma_page(pages[i])) {
 
 			struct page *head = compound_head(pages[i]);
 
@@ -1256,6 +1256,7 @@ static long check_and_migrate_cma_pages(unsigned long start, long nr_pages,
 		for (i = 0; i < nr_pages; i++)
 			put_page(pages[i]);
 
+		pr_emerg("migrating nr_pages");
 		if (migrate_pages(&cma_page_list, new_non_cma_page,
 				  NULL, 0, MIGRATE_SYNC, MR_CONTIG_RANGE)) {
 			/*
@@ -1274,10 +1275,11 @@ static long check_and_migrate_cma_pages(unsigned long start, long nr_pages,
 		nr_pages = get_user_pages(start, nr_pages, gup_flags, pages, vmas);
 		if ((nr_pages > 0) && migrate_allow) {
 			drain_allow = true;
-			goto check_again;
+			//goto check_again;
 		}
 	}
 
+	pr_emerg("Returning with %ld\n", nr_pages);
 	return nr_pages;
 }
 #else
-- 
2.20.1