On Fri, Apr 01, 2022 at 07:06:29PM -0400, Steven Rostedt wrote: > On Fri, 1 Apr 2022 15:50:10 -0400 > Joel Fernandes <joel@xxxxxxxxxxxxxxxxx> wrote: > > > export TRACECMD_TEMPDIR="/data" > > > > That’s fair. What about using memfd for this, do you feel that’s > > reasonable? I have not yet measured how big this file gets but if it’s > > small enough that might work too. > > Is this a separate question? That is, do you mean using the above > environment variable *and* then use memfd? > > I believe that the cache is used for passing the compressed data from the > guest to the host. I don't think it will be more than one compressed chunk. > > But Tzvetomir would know better. Hey Steve, No its the same question. Instead of temp file, I was proposing in-memory file using memfd_create(2), that way no hassle as long as the file is not too huge. Also looks like my patch is incomplete anyway, I need to change tracecmd_msg_handle_cache() as well. I'll try to write up a patch with memfd unless you guys disagree. Thanks, - Joel
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