> On Nov 30, 2019, at 10:03 AM, Warner Losh <[email protected]> wrote:
>
>
>
> On Sat, Nov 30, 2019 at 10:47 AM Enji Cooper <[email protected]
> <mailto:[email protected]>> wrote:
>
> > On Nov 27, 2019, at 6:32 PM, Scott Long <[email protected]> wrote:
> >
> > Author: scottl
> > Date: Thu Nov 28 02:32:17 2019
> > New Revision: 355164
> > URL: https://svnweb.freebsd.org/changeset/base/355164
> > <https://svnweb.freebsd.org/changeset/base/355164>
> >
> > Log:
> > Remove the trm(4) driver
> >
> > Differential Revision: https://reviews.freebsd.org/D22575
> > <https://reviews.freebsd.org/D22575>
>
> Hi Scott,
> I believe this driver was removed because it was impacts the CAM
> GIANT lock removal effort — is that true (I’m asking because the “why” behind
> the removal is unclear)?
>
> Hi Enji,
>
> We're trying hard to get rid of all Giant-locked drivers in the tree, either
> by updating or removal. Since sym(4) provides a super-set of trm(4) and we
> have recent-ish reports of sym(4) working, it makes sense to trim this driver
> from the tree. The specific cards it supports aren't all that popular, the
> couple-extra features that trm(4) gave over sym(4) aren't really that
> relevant today, and it's been years since trm has had good testing and
> maintenance.
Warner,
Thanks so very much for the info :). Glad to see this effort taking
place, since it’s very needed to modernize FreeBSD and improve concurrency in
the kernel, as well as reduce the overall maintenance burden.
Keep up the good work :)!
Cheers!
-Enji
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