Re: CVS commit: src/sys/dev/usb

[Jason Thorpe <thorpej%me.com@localhost>]

> On Oct 24, 2026, at 10:37 AM, Greg Troxel <gdt%lexort.com@localhost> wrote:
> 
> I wonder if it's basically an error to have a pool cache without a
> constructor (semantically).    I suppose "all zeros if there is no
> constructor" is perhaps a reasonable sort-of-constructor, as in "safe
> state before real construction".
> 
> What does openindiana/illumos  do here?

It is not an error to not use a constructor -<em-dash>- esp considering that the general memory allocator is built on top of pool_cache.

IIRC, the original Solaris behavior was “uninitialized if no constructor specified”.  I would not advocate for “always zero-init if no constructor” because that could be wasteful.  I’d rather have it be an explicit ask when the pool_cache is initialized.

-- thorpej