On Thu, Aug 21, 2014 at 9:09 AM, Christoph Hellwig <hch@xxxxxx> wrote:
> This speads up truncate-heavy workloads like fsx by multiple orders of
> magnitude.
>
> Signed-off-by: Christoph Hellwig <hch@xxxxxx>
> ---
> fs/nfs/blocklayout/blocklayout.c | 3 ++-
> 1 file changed, 2 insertions(+), 1 deletion(-)
>
> diff --git a/fs/nfs/blocklayout/blocklayout.c b/fs/nfs/blocklayout/blocklayout.c
> index a7524c4..d5a2b87 100644
> --- a/fs/nfs/blocklayout/blocklayout.c
> +++ b/fs/nfs/blocklayout/blocklayout.c
> @@ -799,7 +799,8 @@ static struct pnfs_layoutdriver_type blocklayout_type = {
> .id = LAYOUT_BLOCK_VOLUME,
> .name = "LAYOUT_BLOCK_VOLUME",
> .owner = THIS_MODULE,
> - .flags = PNFS_READ_WHOLE_PAGE,
> + .flags = PNFS_LAYOUTRET_ON_SETATTR |
> + PNFS_READ_WHOLE_PAGE,
> .read_pagelist = bl_read_pagelist,
> .write_pagelist = bl_write_pagelist,
> .alloc_layout_hdr = bl_alloc_layout_hdr,
> --
Holding this pending resolution of issues with "[PATCH 07/19] pnfs:
add flag to force read-modify-write in ->write_begin" on which there
is a dependency.
--
Trond Myklebust
Linux NFS client maintainer, PrimaryData
trond.myklebust@xxxxxxxxxxxxxxx
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