Don Lewis wrote:
> I recently started seeing the warning message:
> /usr/src/sys/vm/uma_core.c:1332: could sleep with "kernel linker" locked
> from /usr/src/sys/kern/kern_linker.c:1797
> at boot time on my -current box.  It appears to be related to the
> changes in rev 1.90 of kern_linker.c.
> I suspect that memory is getting allocted inside this loop in
> sysctl_kern_function_list():
>         mtx_lock(&kld_mtx);
>         TAILQ_FOREACH(lf, &linker_files, link) {
>                 error = LINKER_EACH_FUNCTION_NAME(lf,
>                     sysctl_kern_function_list_iterate, req);
>                 if (error) {
>                         mtx_unlock(&kld_mtx);
>                         return (error);
>                 }
>         }
>         mtx_unlock(&kld_mtx);
> but I got lost in a maze of twisty little passages.
> And where the heck is LINKER_EACH_FUNCTION_NAME defined?  This is the
> only occurence of this string in the entire /usr/src tree ...

It's defined in linker_if.h, which is a generated header, which is why
you can't find it in the source tree.  This macro calls a kobj function,
which might call malloc().  That's why you're getting the warning.


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