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 which is a significant vmalloc user. The > changelogs could still be improved as well, but I'd rather get it > out quickly for feedback and testing. I just tested this series, the preempt off ftrace log doesn't complain __purge_vmap_area_lazy any more in my test case, this latency is removed! So feel free to add Tested-by: Jisheng Zhang <jszhang@xxxxxxxxxxx> -- To unsubscribe, send a message with 'unsubscribe linux-mm' in the body to majordomo@xxxxxxxxx. For more info on Linux MM, see: http://www.linux-mm.org/ . Don't email: <a href=mailto:"dont@xxxxxxxxx";> email@xxxxxxxxx </a>