From 138ce286eb6ee6d39ca4fb50516e93adaf6b605f Mon Sep 17 00:00:00 2001 From: Wu Fengguang Date: Wed, 16 Dec 2009 12:19:58 +0100 Subject: [PATCH] HWPOISON: return 0 to indicate success reliably Return 0 to indicate success, when - action result is RECOVERED or DELAYED - no extra page reference Note that dirty swapcache pages are kept in swapcache, so can have one more reference count. Signed-off-by: Wu Fengguang Signed-off-by: Andi Kleen --- mm/memory-failure.c | 8 ++++++-- 1 file changed, 6 insertions(+), 2 deletions(-) diff --git a/mm/memory-failure.c b/mm/memory-failure.c index fd1ac1537f06..edeaf2319e74 100644 --- a/mm/memory-failure.c +++ b/mm/memory-failure.c @@ -654,17 +654,21 @@ static int page_action(struct page_state *ps, struct page *p, action_result(pfn, ps->msg, result); count = page_count(p) - 1; - if (count != 0) + if (ps->action == me_swapcache_dirty && result == DELAYED) + count--; + if (count != 0) { printk(KERN_ERR "MCE %#lx: %s page still referenced by %d users\n", pfn, ps->msg, count); + result = FAILED; + } /* Could do more checks here if page looks ok */ /* * Could adjust zone counters here to correct for the missing page. */ - return result == RECOVERED ? 0 : -EBUSY; + return (result == RECOVERED || result == DELAYED) ? 0 : -EBUSY; } #define N_UNMAP_TRIES 5 -- GitLab