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Re: [Xen-devel] [PATCH for-4.7] libxl: set XEN_QEMU_CONSOLE_LIMIT for QEMU



Wei Liu writes ("[PATCH for-4.7] libxl: set XEN_QEMU_CONSOLE_LIMIT for QEMU"):
> XSA-180 provides a patch to QEMU to bodge QEMU logging issue. We
> explicitly set the limit in libxl for 4.7.
...
> +    unsigned long limit = 0;
> +    const char *s = getenv("XEN_QEMU_CONSOLE_LIMIT");
> +
> +    limit = s ? strtoul(s,0,0) : 1*1024*1024;
> +    flexarray_append_pair(dm_envs, "XEN_QEMU_CONSOLE_LIMIT",
> +                          GCSPRINTF("%lu", limit));

This is rather more complex than it needs to be.  What would be wrong
with
  if (getenv("XEN_QEMU_CONSOLE_LIMIT")) return;
  flexarray_append_pair(dm_envs, "XEN_QEMU_CONSOLE_LIMIT", "1048576");
?

But I guess I don't object enough to care, so

Acked-by: Ian Jackson <ian.jackson@xxxxxxxxxxxxx>


> +    flexarray_t *dm_args, *dm_envs;
> +    char **args, **envs;

All these parts are a bit of a palaver but I don't see a better way.
Thanks for doing this work!

Ian.

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