lists.openwall.net | lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC | |
Open Source and information security mailing list archives
| ||
|
Date: Thu, 29 Dec 2011 20:45:14 +0800 From: Hillf Danton <dhillf@...il.com> To: linux-mm@...ck.org Cc: David Rientjes <rientjes@...gle.com>, Hugh Dickins <hughd@...gle.com>, Andrew Morton <akpm@...ux-foundation.org>, KAMEZAWA Hiroyuki <kamezawa.hiroyu@...fujitsu.com>, Michal Hocko <mhocko@...e.cz>, LKML <linux-kernel@...r.kernel.org> Subject: [PATCH] mm: vmscam: check page order in isolating lru pages Before we try to isolate physically contiguous pages, check for page order is added, and if the reclaim order is no larger than page order, we should give up the attempt. Signed-off-by: Hillf Danton <dhillf@...il.com> Cc: Michal Hocko <mhocko@...e.cz> Cc: KAMEZAWA Hiroyuki <kamezawa.hiroyu@...fujitsu.com> Cc: Andrew Morton <akpm@...ux-foundation.org> Cc: David Rientjes <rientjes@...gle.com> Cc: Hugh Dickins <hughd@...gle.com> --- --- a/mm/vmscan.c Thu Dec 29 20:20:16 2011 +++ b/mm/vmscan.c Thu Dec 29 20:28:14 2011 @@ -1162,6 +1162,7 @@ static unsigned long isolate_lru_pages(u unsigned long end_pfn; unsigned long page_pfn; int zone_id; + unsigned int isolated_pages = 0; page = lru_to_page(src); prefetchw_prev_lru_page(page, src, flags); @@ -1172,7 +1173,7 @@ static unsigned long isolate_lru_pages(u case 0: mem_cgroup_lru_del(page); list_move(&page->lru, dst); - nr_taken += hpage_nr_pages(page); + isolated_pages = hpage_nr_pages(page); break; case -EBUSY: @@ -1184,8 +1185,11 @@ static unsigned long isolate_lru_pages(u BUG(); } + nr_taken += isolated_pages; if (!order) continue; + if (isolated_pages != 1 && isolated_pages >= (1 << order)) + continue; /* * Attempt to take all pages in the order aligned region @@ -1227,7 +1231,6 @@ static unsigned long isolate_lru_pages(u break; if (__isolate_lru_page(cursor_page, mode, file) == 0) { - unsigned int isolated_pages; mem_cgroup_lru_del(cursor_page); list_move(&cursor_page->lru, dst); -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@...r.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
Powered by blists - more mailing lists