On Sat, 11 Nov 2023 at 14:45, Steve Dickson <steved@xxxxxxxxxx> wrote: > > > > On 11/10/23 2:08 PM, Trond Myklebust wrote: > > On Fri, 2023-11-10 at 11:54 -0500, Steve Dickson wrote: > >> Hello, > >> > >> My apologies on this delay... > >> > >> On 8/28/23 1:53 AM, Chengen Du wrote: > >>> Add an option that triggers the clearing of the file > >>> access cache as soon as the cache timestamp becomes > >>> older than the user's login time. > >>> > >>> Signed-off-by: Chengen Du <chengen.du@xxxxxxxxxxxxx> > >> On a 6.7-rc0 kernel I'm getting "nfs: Unknown parameter 'fasc'" > >> error... was this never implemented? > >> > > > > No. There are no plans to add any mount parameters for this > > functionality. > Thank you! Just to add, we still revert the patches that changed the default behaviour from v6.2 onwards. We found that the access cache not only gets wiped by interactive user logins, but also various automated processes (e.g. sar/systat collection) that also frequently "login" across all our clients. When you scale this up across thousands of clients (render farm), the result was a 40% increase in (ACCESS) IOPs to our netapps and a 20% increase in their CPU usage. So we will continue to revert the patches for as long as we can. Cheers, Daire
