The patch titled Subject: swap: redirty page if page write fails on swap file has been added to the -mm tree. Its filename is swap-redirty-page-if-page-write-fails-on-swap-file.patch Before you just go and hit "reply", please: a) Consider who else should be cc'ed b) Prefer to cc a suitable mailing list as well c) Ideally: find the original patch on the mailing list and do a reply-to-all to that, adding suitable additional cc's *** Remember to use Documentation/SubmitChecklist when testing your code *** The -mm tree is included into linux-next and is updated there every 3-4 working days ------------------------------------------------------ From: Jerome Marchand <jmarchan@xxxxxxxxxx> Subject: swap: redirty page if page write fails on swap file Since 62c230b ("mm: add support for a filesystem to activate swap files and use direct_IO for writing swap pages"), swap_writepage() calls direct_IO on swap files. However, in that case the page isn't redirtied if I/O fails, and is therefore handled afterwards as if it has been successfully written to the swap file, leading to memory corruption when the page is eventually swapped back in. This patch sets the page dirty when direct_IO() fails. It fixes a memory corruption that happened while using swap-over-NFS. Signed-off-by: Jerome Marchand <jmarchan@xxxxxxxxxx> Acked-by: Johannes Weiner <hannes@xxxxxxxxxxx> Acked-by: Mel Gorman <mgorman@xxxxxxx> Cc: Hugh Dickins <hughd@xxxxxxxxxx> Cc: <stable@xxxxxxxxxxxxxxx> Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx> --- mm/page_io.c | 2 ++ 1 file changed, 2 insertions(+) diff -puN mm/page_io.c~swap-redirty-page-if-page-write-fails-on-swap-file mm/page_io.c --- a/mm/page_io.c~swap-redirty-page-if-page-write-fails-on-swap-file +++ a/mm/page_io.c @@ -230,6 +230,8 @@ int __swap_writepage(struct page *page, if (ret == PAGE_SIZE) { count_vm_event(PSWPOUT); ret = 0; + } else { + set_page_dirty(page); } return ret; } _ Patches currently in -mm which might be from jmarchan@xxxxxxxxxx are swap-redirty-page-if-page-write-fails-on-swap-file.patch -- To unsubscribe from this list: send the line "unsubscribe stable" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html