Re: [patch 1/4] Linux Kernel Markers - Architecture Independent Code

Steven Rostedt
2007-09-21T00:59:36Z

On Tue, Sep 18, 2007 at 05:13:25PM -0400, Mathieu Desnoyers wrote:
> +/*
> + * Sets the probe callback corresponding to one marker.
> + */
> +static int set_marker(struct marker_entry **entry,
> + struct __mark_marker *elem)
> +{
> + int ret;
> + BUG_ON(strcmp((*entry)->name, elem->name) != 0);

Can you switch this at least to WARN_ON? Killing a system with X
running where the user just sees a freeze is not that nice. But a nasty
message in dmesg is very noticable.

-- Steve

> +
> + if ((*entry)->format) {
> + if (strcmp((*entry)->format, elem->format) != 0) {
> + printk(KERN_NOTICE
> + "Format mismatch for probe %s "
> + "(%s), marker (%s)\n",
> + (*entry)->name,
> + (*entry)->format,
> + elem->format);
> + return -EPERM;
> + }
> + } else {
> + ret = marker_set_format(entry, elem->format);
> + if (ret)
> + return ret;
> + }
> + elem->call = (*entry)->probe;
> + elem->pdata = (*entry)->pdata;
> + _immediate_set(elem->state, 1);
> + return 0;
> +}