On 08/14/2019 07:35 AM, Marc Schöchlin wrote: >>> 3. I wonder if we are hitting a bug with PF_MEMALLOC Ilya hit with krbd. >>> He removed that code from the krbd. I will ping him on that. > > Interesting. I activated Coredumps for that processes - probably we can > find something interesting here... > Can you replicate the problem with timeout=0 on a 4.4 kernel (ceph version does not matter as long as its known to hit the problem). When you start to see IO hang and it gets jammed up can you do: dmesg -c; echo w >/proc/sysrq-trigger; dmesg -c >waiting-tasks.txt and give me the waiting-tasks.txt so I can check if we are stuck in the kernel waiting for memory. _______________________________________________ ceph-users mailing list ceph-users@xxxxxxxxxxxxxx http://lists.ceph.com/listinfo.cgi/ceph-users-ceph.com
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