Messages in this thread | | | Date | Fri, 12 Dec 2014 16:44:49 -0800 | Subject | Re: frequent lockups in 3.18rc4 | From | Linus Torvalds <> |
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On Fri, Dec 12, 2014 at 4:34 PM, Sasha Levin <sasha.levin@oracle.com> wrote: > > Right, it's virtio-9p. However, virtio-9p acts merely as a proxy to an underlying > tmpfs - so while it's slow, I don't think it's way slower than the average disk > backed ext4.
I was thinking more in the sense of "how much of the trouble is about something like tmpfs eating tons of memory when trinity starts doing random system calls on those files".
I was also thinking that some of it might be filesystem-specific. We already *did* see one trace where it was in the loop getting virtio channel data. Maybe it's actually possible to overwhelm the 9p filesystem exactly because the backing store is tmpfs, and basically have a CPU 100% busy handling ring events from the virtual filesystem..
But I'm just flailing..
Linus
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