Re: [Libguestfs] a question about multithreading with libguestfs
On Mon, Jun 26, 2017 at 10:27:54AM +0300, Maxim Kozover wrote:
I'd like to ask you, please, about multithreading with
libguestfs.
I'm using libguestfs 1.36.4 with Perl front-end.
Should it be possible to have the same libguestfs appliance provide both
fuse interface and periodically perform some longer APIs like find0?
I mean make one Perl thread do mount_local_run and another thread
periodically run find0 that executes simultaneously with fuse (hopefully
not blocking fuse functionality internally until find0 exits)?
Unfortunately not, and as you discovered it will (currently) crash.
When I'm trying this, the whole thing crashes, so the question is
if it
should be possible, please, and if yes, how could the problem be fixed?
This is really a bug, and something we've been meaning to fix. What
should happen is there is a lock in the handle which every API takes.
It requires some changes to the generator to implement but is not
necessary hard to do. In fact I posted patches for it a while back,
but they did not get upstream:
https://www.redhat.com/archives/libguestfs/2015-June/msg00048.html
Rich.
--
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