nfsd patches to fix deadlock

nfsd patches to fix deadlock

[Khazhy Kumykov]

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Please consider the following 2 patches for stable 5.4. They applied
cleanly to 5.4.y for me, and fix a deadlock we have experienced. (See
discussion at https://lore.kernel.org/linux-nfs/a9cf9bcd72a187127b73042a9369e17bd5a0e93d.camel@hammerspace.com
). These patches are from 5.5, so newer kernels should not need it. I
looked at 4.19, and it looks like this issue should not exist in that
kernel (we don't have filecache.c and it's associated shrinker). I
have not looked at older kernels, but presume the issue also does not
apply there.

9542e6a643fc ("nfsd: Containerise filecache laundrette")
36ebbdb96b69 ("nfsd: cleanup nfsd_file_lru_dispose()")

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Re: nfsd patches to fix deadlock

[Greg KH]

On Wed, Mar 23, 2022 at 01:01:58PM -0700, Khazhy Kumykov wrote:
> Please consider the following 2 patches for stable 5.4. They applied
> cleanly to 5.4.y for me, and fix a deadlock we have experienced. (See
> discussion at https://lore.kernel.org/linux-nfs/a9cf9bcd72a187127b73042a9369e17bd5a0e93d.camel@hammerspace.com
> ). These patches are from 5.5, so newer kernels should not need it. I
> looked at 4.19, and it looks like this issue should not exist in that
> kernel (we don't have filecache.c and it's associated shrinker). I
> have not looked at older kernels, but presume the issue also does not
> apply there.
> 
> 9542e6a643fc ("nfsd: Containerise filecache laundrette")
> 36ebbdb96b69 ("nfsd: cleanup nfsd_file_lru_dispose()")

Now queued up, thanks.

greg k-h