On Tue, May 17, 2016 at 8:05 PM, Somnath Roy <Somnath.Roy@xxxxxxxxxxx> wrote:
> Hi Ilya,
> Could you please let us know at what upstream kernel version the TCP_NODELAY krbd patch went in ?
> Is it there in RHEL 7.2 and Ubuntu 16.04 LTS ?
It went into 4.0. IIRC 16.04 LTS is based on 4.4, so yes to both.
You can check it yourself with rbd map -o tcp_nodelay <imagename>.
If it doesn't fail with "libceph: bad option ..." in the dmesg, it's
there.
Thanks,
Ilya
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