From: Hillf Danton <dhillf@gmail.com>
To: Hugh Dickins <hughd@google.com>
Cc: David Rientjes <rientjes@google.com>,
KAMEZAWA Hiroyuki <kamezawa.hiroyu@jp.fujitsu.com>,
Andrea Arcangeli <aarcange@redhat.com>,
Andrew Morton <akpm@linux-foundation.org>,
linux-mm@kvack.org, LKML <linux-kernel@vger.kernel.org>
Subject: [PATCH] mm: vmscan: try to free orphaned page
Date: Mon, 12 Dec 2011 20:24:39 +0800 [thread overview]
Message-ID: <CAJd=RBAN7cK_6OstO=5gszW8cJ_d4-8iQC3gWG6HUtabiMN9Yg@mail.gmail.com> (raw)
If the orphaned page has no buffer attached at the moment, we clean it up by
hand, then it has the chance to progress the freeing trip.
Signed-off-by: Hillf Danton <dhillf@gmail.com>
---
--- a/mm/vmscan.c Sun Dec 4 13:10:08 2011
+++ b/mm/vmscan.c Mon Dec 12 20:12:44 2011
@@ -487,12 +487,10 @@ static pageout_t pageout(struct page *pa
* Some data journaling orphaned pages can have
* page->mapping == NULL while being dirty with clean buffers.
*/
- if (page_has_private(page)) {
- if (try_to_free_buffers(page)) {
- ClearPageDirty(page);
- printk("%s: orphaned page\n", __func__);
- return PAGE_CLEAN;
- }
+ if (!page_has_private(page) || try_to_free_buffers(page)) {
+ ClearPageDirty(page);
+ printk(KERN_INFO "%s: orphaned page\n", __func__);
+ return PAGE_CLEAN;
}
return PAGE_KEEP;
}
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next reply other threads:[~2011-12-12 12:24 UTC|newest]
Thread overview: 2+ messages / expand[flat|nested] mbox.gz Atom feed top
2011-12-12 12:24 Hillf Danton [this message]
2011-12-12 23:12 ` Andrew Morton
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