Re: [PATCH 1/5] MM: avoid throttling reclaim for loop-back nfsd threads.

2014-04-23 Thread NeilBrown
On Wed, 23 Apr 2014 15:03:18 -0700 Andrew Morton wrote: > On Wed, 23 Apr 2014 12:40:58 +1000 NeilBrown wrote: > > > When a loop-back NFS mount is active and the backing device for the > > NFS mount becomes congested, that can impose throttling delays on the > > nfsd threads. > > > > These dela

Re: [PATCH 1/5] MM: avoid throttling reclaim for loop-back nfsd threads.

2014-04-23 Thread Andrew Morton
On Wed, 23 Apr 2014 12:40:58 +1000 NeilBrown wrote: > When a loop-back NFS mount is active and the backing device for the > NFS mount becomes congested, that can impose throttling delays on the > nfsd threads. > > These delays significantly reduce throughput and so the NFS mount > remains conges

[PATCH 1/5] MM: avoid throttling reclaim for loop-back nfsd threads.

2014-04-22 Thread NeilBrown
When a loop-back NFS mount is active and the backing device for the NFS mount becomes congested, that can impose throttling delays on the nfsd threads. These delays significantly reduce throughput and so the NFS mount remains congested. This results in a live lock and the reduced throughput persi