This patch gets around the aio ring pages can't be migrated bug caused by get_user_pages() via using the new function. It only works as configed with CONFIG_MEMORY_HOTREMOVE, otherwise it falls back to use the old version of get_user_pages().
Cc: Benjamin LaHaise <[email protected]> Cc: Alexander Viro <[email protected]> Cc: Andrew Morton <[email protected]> Cc: Jeff Moyer <[email protected]> Cc: Minchan Kim <[email protected]> Cc: Zach Brown <[email protected]> Reviewed-by: Tang Chen <[email protected]> Reviewed-by: Gu Zheng <[email protected]> Signed-off-by: Lin Feng <[email protected]> --- fs/aio.c | 4 ++-- 1 files changed, 2 insertions(+), 2 deletions(-) diff --git a/fs/aio.c b/fs/aio.c index 2512232..193e145 100644 --- a/fs/aio.c +++ b/fs/aio.c @@ -210,8 +210,8 @@ static int aio_setup_ring(struct kioctx *ctx) } pr_debug("mmap address: 0x%08lx\n", ctx->mmap_base); - ctx->nr_pages = get_user_pages(current, mm, ctx->mmap_base, nr_pages, - 1, 0, ctx->ring_pages, NULL); + ctx->nr_pages = get_user_pages_non_movable(current, mm, ctx->mmap_base, + nr_pages, 1, 0, ctx->ring_pages, NULL); up_write(&mm->mmap_sem); if (unlikely(ctx->nr_pages != nr_pages)) { -- 1.7.1 -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to [email protected] More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
