On Sat, Mar 26, 2016 at 10:42 PM, Jakob Unterwurzacher <jakobunt@xxxxxxxxx> wrote: > On 16.03.2016 10:44, Miklos Szeredi wrote: >> On Tue, Mar 15, 2016 at 8:55 AM, Jakob Unterwurzacher >> <jakobunt@xxxxxxxxx> wrote: >>> Just for anybody finding this thread: This still happens in v4.4, it >>> just took longer to trigger. >>> >>> I have posted more details to linux-kernel (copy-pasted below), >>> http://thread.gmane.org/gmane.linux.kernel/2132944 >> >> Okay, so you can reproduce this relatively quickly. Can you try "git >> bisect" to find exactly which commit is responsible? >> >> Thanks, >> Miklos > > That took a while, but it looks like it got it: > >> commit 947e9762a8ddefda38aa21e249e6a4fec215cd12 >> Author: Tejun Heo <tj@xxxxxxxxxx> >> Date: Fri May 22 18:23:32 2015 -0400 >> >> writeback: update wb_over_bg_thresh() to use wb_domain aware operations > Tejun, Any idea why this commit stalls fuse mmap writes? Here's the start of the this thread: http://marc.info/?l=fuse-devel&m=145008058603261&w=2 Thanks, Miklos > Note that this commens seems to only activate changes that happened in the > commit before, aa661bb: > >> commit aa661bbe1e61ce80ca4ae98804f673ede94b0827 >> Author: Tejun Heo <tj@xxxxxxxxxx> >> Date: Fri May 22 18:23:31 2015 -0400 >> >> writeback: move over_bground_thresh() to mm/page-writeback.c > > > Anyway, I can reliably reboot between aa661bb and 947e976 and always get the > same results: > > aa661bb passes > 947e976 fails > > I you want to reproduce, clone https://github.com/rfjakob/mmapwrite.git and > run ./encfs-test.sh (needs encfs installed). On the bad kernel, it will hang > within a few seconds. > > Thanks, > Jakob -- To unsubscribe from this list: send the line "unsubscribe linux-fsdevel" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
