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Date: Thu, 13 Dec 2012 09:48:25 -0500
Message-ID: <CADnza45K-LgvNDt1_AoybesMobwsnw=vGX9D4wkvwKLKMkes5A@mail.gmail.com>
Subject: Re: local_lock mount option
From: Fred Isaman <faisaman4@gmail.com>
To: Lukas Hejtmanek <xhejtman@gmail.com>
Cc: linux-nfs@vger.kernel.org
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On Thu, Dec 13, 2012 at 9:40 AM, Lukas Hejtmanek <xhejtman@gmail.com> wrote:
> On Thu, Dec 13, 2012 at 09:38:04AM -0500, Fred Isaman wrote:
>> It is turned off here:
>>
>> static void nfs4_validate_mount_flags(struct nfs_parsed_mount_data *args)
>> {
>>       args->flags &= ~(NFS_MOUNT_NONLM|NFS_MOUNT_NOACL|NFS_MOUNT_VER3|
>>                        NFS_MOUNT_LOCAL_FLOCK|NFS_MOUNT_LOCAL_FCNTL);
>> }
>
> ok, thanks. Is there any reason for this? I need to turn of locks for NFSv4 as
> they seem to not work properly with NFS server on CXFS.
>
> --
> Lukáš Hejtmánek

The idea is that delegations are a better way to decide whether the
client should cache locks.

Fred