On Tue, 6 May 2014 16:54:18 -0400 "J. Bruce Fields" <bfields@xxxxxxxxxxxx> wrote: > On Wed, Apr 23, 2014 at 12:40:58PM +1000, NeilBrown wrote: > > PF_LESS_THROTTLE has a very specific use case: to avoid deadlocks > > and live-locks while writing to the page cache in a loop-back > > NFS mount situation. > > > > It therefore makes sense to *only* set PF_LESS_THROTTLE in this > > situation. > > We now know when a request came from the local-host so it could be a > > loop-back mount. We already know when we are handling write requests, > > and when we are doing anything else. > > > > So combine those two to allow nfsd to still be throttled (like any > > other process) in every situation except when it is known to be > > problematic. > > Looks simple enough, ACK.--b. > Thanks. I'll resend the bits need for just this. The NFS side need to wait for wait_on_bit improvements which seem to be on a slow path at the moment. Thanks, NeilBrown
Attachment:
signature.asc
Description: PGP signature
