Re: [RFC] reduce latency in __purge_vmap_area_lazy

2016-10-20 Thread Joel Fernandes
On Mon, Oct 17, 2016 at 11:56 PM, Christoph Hellwig wrote: > Hi all, > > this is my spin at sorting out the long lock hold times in > __purge_vmap_area_lazy. It is based on the patch from Joel sent this > week. I don't have any good numbers for it, but it survived an > xfstests run on XFS which

Re: [RFC] reduce latency in __purge_vmap_area_lazy

2016-10-18 Thread Jisheng Zhang
On Tue, 18 Oct 2016 08:56:05 +0200 Christoph Hellwig wrote: > Hi all, > > this is my spin at sorting out the long lock hold times in > __purge_vmap_area_lazy. It is based on the patch from Joel sent this > week. I don't have any good numbers for it, but it survived an > xfstests run on XFS whic

Re: [RFC] reduce latency in __purge_vmap_area_lazy

2016-10-18 Thread Nicholas Piggin
On Tue, 18 Oct 2016 08:56:05 +0200 Christoph Hellwig wrote: > Hi all, > > this is my spin at sorting out the long lock hold times in > __purge_vmap_area_lazy. It is based on the patch from Joel sent this > week. I don't have any good numbers for it, but it survived an > xfstests run on XFS whi

[RFC] reduce latency in __purge_vmap_area_lazy

2016-10-17 Thread Christoph Hellwig
Hi all, this is my spin at sorting out the long lock hold times in __purge_vmap_area_lazy. It is based on the patch from Joel sent this week. I don't have any good numbers for it, but it survived an xfstests run on XFS which is a significant vmalloc user. The changelogs could still be improved