[PATCH] io accounting minor fix

[Fengguang Wu]

Account only successful nfs/fuse reads.

Signed-off-by: Fengguang Wu <[EMAIL PROTECTED]>
---

--- linux-2.6.19-rc6-mm2.orig/mm/readahead.c
+++ linux-2.6.19-rc6-mm2/mm/readahead.c
@@ -242,7 +242,6 @@ int read_cache_pages(struct address_spac
                        page_cache_release(page);
                        continue;
                }
-               task_io_account_read(PAGE_CACHE_SIZE);
                ret = filler(data, page);
                if (!pagevec_add(&lru_pvec, page)) {
                        cond_resched();
@@ -252,6 +251,7 @@ int read_cache_pages(struct address_spac
                        put_pages_list(pages);
                        break;
                }
+               task_io_account_read(PAGE_CACHE_SIZE);
        }
        pagevec_lru_add(&lru_pvec);
        return ret;
-
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