Reviewed-by: Sage Weil <sage@xxxxxxxxxx>
On Fri, 10 Oct 2014, Ilya Dryomov wrote:
> Commit f363e45fd118 ("net/ceph: make ceph_msgr_wq non-reentrant")
> effectively removed WQ_MEM_RECLAIM flag from ceph_msgr_wq. This is
> wrong - libceph is very much a memory reclaim path, so restore it.
>
> Cc: stable@xxxxxxxxxxxxxxx # needs backporting for < 3.12
> Signed-off-by: Ilya Dryomov <idryomov@xxxxxxxxxx>
> Tested-by: Micha Krause <micha@xxxxxxxxxx>
> ---
> net/ceph/messenger.c | 6 +++++-
> 1 file changed, 5 insertions(+), 1 deletion(-)
>
> diff --git a/net/ceph/messenger.c b/net/ceph/messenger.c
> index 9764c771cfb1..559c9f619c20 100644
> --- a/net/ceph/messenger.c
> +++ b/net/ceph/messenger.c
> @@ -292,7 +292,11 @@ int ceph_msgr_init(void)
> if (ceph_msgr_slab_init())
> return -ENOMEM;
>
> - ceph_msgr_wq = alloc_workqueue("ceph-msgr", 0, 0);
> + /*
> + * The number of active work items is limited by the number of
> + * connections, so leave @max_active at default.
> + */
> + ceph_msgr_wq = alloc_workqueue("ceph-msgr", WQ_MEM_RECLAIM, 0);
> if (ceph_msgr_wq)
> return 0;
>
> --
> 1.7.10.4
>
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