Request for inclusion on linux-4.14.y

Request for inclusion on linux-4.14.y

[Qian Lu]

Hello Greg,

Can you please consider including the following patches in the stable
linux-4.14.y branch?

An NFS server accepts only a limited number of concurrent v4.1+ mounts. Once
that limit is reached, on the affected client side, mount.nfs appears to hang to
keep reissuing CREATE_SESSION calls until one of them succeeds. This is to bump
the limit, also return smaller ca_maxrequests as the limit approaches instead of
waiting till we have to fail CREATE_SESSION completely.

44d8660d3bb0("nfsd: increase DRC cache limit")
de766e570413("nfsd: give out fewer session slots as limit approaches")
c54f24e338ed("nfsd: fix performance-limiting session calculation")


Thanks, 
Qian Lu

Re: Request for inclusion on linux-4.14.y

[Sasha Levin]

On Fri, Jul 26, 2019 at 02:36:35PM -0700, Qian Lu wrote:
>Hello Greg,
>
>Can you please consider including the following patches in the stable
>linux-4.14.y branch?
>
>An NFS server accepts only a limited number of concurrent v4.1+ mounts. Once
>that limit is reached, on the affected client side, mount.nfs appears to hang to
>keep reissuing CREATE_SESSION calls until one of them succeeds. This is to bump
>the limit, also return smaller ca_maxrequests as the limit approaches instead of
>waiting till we have to fail CREATE_SESSION completely.
>
>44d8660d3bb0("nfsd: increase DRC cache limit")
>de766e570413("nfsd: give out fewer session slots as limit approaches")
>c54f24e338ed("nfsd: fix performance-limiting session calculation")

I've queued these 3 for 4.14 and older.

Note that c54f24e338ed has a fix: 3b2d4dcf71c4a ("nfsd: Fix overflow
causing non-working mounts on 1 TB machines") which was queued as well.

--
Thanks,
Sasha

Re: Request for inclusion on linux-4.14.y

[J. Bruce Fields]

On Sun, Jul 28, 2019 at 11:04:25AM -0400, Sasha Levin wrote:
> On Fri, Jul 26, 2019 at 02:36:35PM -0700, Qian Lu wrote:
> > Hello Greg,
> > 
> > Can you please consider including the following patches in the stable
> > linux-4.14.y branch?
> > 
> > An NFS server accepts only a limited number of concurrent v4.1+ mounts. Once
> > that limit is reached, on the affected client side, mount.nfs appears to hang to
> > keep reissuing CREATE_SESSION calls until one of them succeeds. This is to bump
> > the limit, also return smaller ca_maxrequests as the limit approaches instead of
> > waiting till we have to fail CREATE_SESSION completely.
> > 
> > 44d8660d3bb0("nfsd: increase DRC cache limit")
> > de766e570413("nfsd: give out fewer session slots as limit approaches")
> > c54f24e338ed("nfsd: fix performance-limiting session calculation")
> 
> I've queued these 3 for 4.14 and older.
> 
> Note that c54f24e338ed has a fix: 3b2d4dcf71c4a ("nfsd: Fix overflow
> causing non-working mounts on 1 TB machines") which was queued as well.

Thanks for catching that.  These sound like reasonable stable backports.

--b.

Request for inclusion on linux-4.14.y

[Qian Lu]

Hello Greg,

Can you please consider including the following patch in the stable linux-4.14.y branch?

This is to fix that NFS client incorrectly handling a failed OPEN and ensure that we present the same verifier.

8fd1ab747d2b("NFSv4: Fix open create exclusive when the server reboots")

Thanks,
Qian Lu

Re: Request for inclusion on linux-4.14.y

[Sasha Levin]

On Fri, Jul 26, 2019 at 11:17:39AM -0700, Qian Lu wrote:
>Hello Greg,
>
>Can you please consider including the following patch in the stable linux-4.14.y branch?
>
>This is to fix that NFS client incorrectly handling a failed OPEN and ensure that we present the same verifier.
>
>8fd1ab747d2b("NFSv4: Fix open create exclusive when the server reboots")

I've queued it up for 4.14 and older, thanks!

--
Thanks,
Sasha

Request for inclusion on linux-4.14.y

[Alakesh Haloi]

Hello Greg,

Can you please consider including the following patch in the stable
linux-4.14.y branch?

This is to fix a defect in the Hyper-V network driver (hv_netsvc) that
triggers kernel null pointer dereference bug, while loading the driver.

b19b46346f48("hv/netvsc: Fix NULL dereference at single queue mode fallback")

Thanks
Alakesh Haloi

Re: Request for inclusion on linux-4.14.y

[Greg KH]

On Wed, Sep 19, 2018 at 10:37:44PM +0000, Alakesh Haloi wrote:
> Hello Greg,
> 
> Can you please consider including the following patch in the stable
> linux-4.14.y branch?
> 
> This is to fix a defect in the Hyper-V network driver (hv_netsvc) that
> triggers kernel null pointer dereference bug, while loading the driver.
> 
> b19b46346f48("hv/netvsc: Fix NULL dereference at single queue mode fallback")

Now applied, thanks.

greg k-h