Date: Tue, 31 Oct 2023 17:37:46 -0700 From: Rick Macklem <rick.macklem@gmail.com> To: John Baldwin <jhb@freebsd.org> Cc: Zhenlei Huang <zlei@freebsd.org>, Gordon Bergling <gbe@freebsd.org>, FreeBSD Current <current@freebsd.org>, gallatin@freebsd.org Subject: Re: KTLS thread on 14.0-RC3 Message-ID: <CAM5tNy7pdh0R=G4MGvEkOp9xmh_N7coHtRMMt1VZ5rSEWog9KA@mail.gmail.com> In-Reply-To: <77952261-2fe0-428e-b72c-d805f0273a76@FreeBSD.org> References: <ZT4pKpw35P-J-Q_T@bastion.ttyv0.de> <F6D87896-038C-4152-AFBD-68B0DDC71801@FreeBSD.org> <53AC8651-141E-4950-84D9-FD94E8B353FD@FreeBSD.org> <77952261-2fe0-428e-b72c-d805f0273a76@FreeBSD.org>
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On Tue, Oct 31, 2023 at 10:06=E2=80=AFAM John Baldwin <jhb@freebsd.org> wro= te: > > On 10/30/23 3:41 AM, Zhenlei Huang wrote: > > > > > >> On Oct 30, 2023, at 12:09 PM, Zhenlei Huang <zlei@FreeBSD.org> wrote: > >> > >> > >> > >>> On Oct 29, 2023, at 5:43 PM, Gordon Bergling <gbe@freebsd.org> wrote: > >>> > >>> Hi, > >>> > >>> I am currently building a new system, which should be based on 14.0-R= ELEASE. > >>> Therefor I am tracking releng/14.0 since its creation and updating it= currently > >>> via the usualy buildworld steps. > >>> > >>> What I have noticed recently is, that the [KTLS] is missing. I have a= stable/13 > >>> system which shows the [KTLS] thread and a very recent -CURRENT that = also shows > >>> the [KTLS] thread. > >>> > >>> The stable/13 and releng/14.0 systems both use the GENERIC kernel, wi= thout any > >>> custom modifications. > >>> > >>> Loaded KLDs are also the same. > >>> > >>> Did I miss something, or is there something in releng/14.0 missing, w= hich > >>> is currenlty enabled in stable/13? > >> > >> KTLS shall still work as intended, the creation of it threads is defer= red. > >> > >> See a72ee355646c (ktls: Defer creation of threads and zones until firs= t use) > >>> Run ktls_init() when the first KTLS session is created rather than > >>> unconditionally during boot. This avoids creating unused threads and > >>> allocating unused resources on systems which do not use KTLS. > >> > >> ``` > >> -SYSINIT(ktls, SI_SUB_SMP + 1, SI_ORDER_ANY, ktls_init, NULL); > >> ``` > > > > Seems 14.0 only create one KTLS thread. > > > > IIRC 13.2 create one thread per core. > > That part should not be different. There should always be one thread per= core. Just fyi, I see one thread/core. Did you happen to do something like "ps ax" instead of "ps axHl"? rick ps: I also see a reclaim_0 thread. > > -- > John Baldwin > >
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