Messages in this thread Patch in this message | | | From | Lin Feng <> | Subject | [PATCH V3 2/2] fs/aio.c: use get_user_pages_non_movable() to pin ring pages when support memory hotremove | Date | Thu, 21 Feb 2013 19:01:44 +0800 |
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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 <bcrl@kvack.org> Cc: Alexander Viro <viro@zeniv.linux.org.uk> Cc: Andrew Morton <akpm@linux-foundation.org> Cc: Jeff Moyer <jmoyer@redhat.com> Cc: Minchan Kim <minchan@kernel.org> Cc: Zach Brown <zab@redhat.com> Reviewed-by: Tang Chen <tangchen@cn.fujitsu.com> Reviewed-by: Gu Zheng <guz.fnst@cn.fujitsu.com> Signed-off-by: Lin Feng <linfeng@cn.fujitsu.com> --- 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
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