On Mon, Nov 6, 2023 at 3:42 PM Leonardo Bras wrote:
>
> On Sun, Sep 10, 2023 at 04:28:54AM -0400, guo...@kernel.org wrote:
> > From: Guo Ren
> >
> > patch[1 - 10]: Native qspinlock
> > patch[11 -17]: Paravirt qspinlock
> >
> > patch[4]: Add prefetchw
On Tue, Sep 19, 2023 at 1:30 PM Leonardo Bras wrote:
>
> On Sun, Sep 17, 2023 at 11:12:31PM +0800, Guo Ren wrote:
> > On Thu, Sep 14, 2023 at 4:02 PM Leonardo Bras wrote:
> > >
> > > On Sun, Sep 10, 2023 at 04:29:02AM -0400, guo...@kernel.org wrote:
> > >
On Tue, Sep 19, 2023 at 1:13 PM Leonardo Bras wrote:
>
> On Sun, Sep 17, 2023 at 10:34:36PM +0800, Guo Ren wrote:
> > On Sat, Sep 16, 2023 at 9:25 AM Leonardo Bras wrote:
> > >
> > > On Fri, Sep 15, 2023 at 08:36:31PM +0800, Guo Ren wrote:
> > > > On
On Thu, Sep 14, 2023 at 4:32 PM Leonardo Bras wrote:
>
> On Sun, Sep 10, 2023 at 04:29:03AM -0400, guo...@kernel.org wrote:
> > From: Guo Ren
> >
> > The early version of T-Head C9xx cores has a store merge buffer
> > delay problem. The store merge buffer
On Thu, Sep 14, 2023 at 4:02 PM Leonardo Bras wrote:
>
> On Sun, Sep 10, 2023 at 04:29:02AM -0400, guo...@kernel.org wrote:
> > From: Guo Ren
> >
> > Add a static key controlling whether virt_spin_lock() should be
> > called or not. When running on bare meta
On Fri, Sep 15, 2023 at 2:23 PM Leonardo Bras wrote:
>
> On Sun, Sep 10, 2023 at 04:29:07AM -0400, guo...@kernel.org wrote:
> > From: Guo Ren
> >
> > Implement pv_kick with SBI implementation, and add SBI_EXT_PVLOCK
> > extension detection.
> >
> > Sign
On Fri, Sep 15, 2023 at 2:05 PM Leonardo Bras wrote:
>
> On Sun, Sep 10, 2023 at 04:29:06AM -0400, guo...@kernel.org wrote:
> > From: Guo Ren
> >
> > Disables the qspinlock slow path using PV optimizations which
> > allow the hypervisor to 'idle' the gues
On Fri, Sep 15, 2023 at 5:08 PM Leonardo Bras wrote:
>
> On Fri, Sep 15, 2023 at 10:10:25AM +0800, Guo Ren wrote:
> > On Thu, Sep 14, 2023 at 5:43 PM Leonardo Bras wrote:
> > >
> > > On Thu, Sep 14, 2023 at 12:46:56PM +0800, Guo Ren wrote:
> > > > On
On Fri, Sep 15, 2023 at 1:42 PM Leonardo Bras wrote:
>
> On Sun, Sep 10, 2023 at 04:29:05AM -0400, guo...@kernel.org wrote:
> > From: Guo Ren
> >
> > Using static_call to switch between:
> > native_queued_spin_lock_slowpath()__pv_queued_spin_lock_slowpath()
&
On Sat, Sep 16, 2023 at 9:25 AM Leonardo Bras wrote:
>
> On Fri, Sep 15, 2023 at 08:36:31PM +0800, Guo Ren wrote:
> > On Wed, Sep 13, 2023 at 4:50 PM Leonardo Bras wrote:
> > >
> > > On Sun, Sep 10, 2023 at 04:28:57AM -0400, guo...@kernel.org wrote:
> > >
On Wed, Sep 13, 2023 at 4:50 PM Leonardo Bras wrote:
>
> On Sun, Sep 10, 2023 at 04:28:57AM -0400, guo...@kernel.org wrote:
> > From: Guo Ren
> >
> > Cache-block prefetch instructions are HINTs to the hardware to
> > indicate that software intends to perform a
On Thu, Sep 14, 2023 at 5:43 PM Leonardo Bras wrote:
>
> On Thu, Sep 14, 2023 at 12:46:56PM +0800, Guo Ren wrote:
> > On Thu, Sep 14, 2023 at 4:29 AM Leonardo Bras wrote:
> > >
> > > On Sun, Sep 10, 2023 at 04:28:59AM -0400, guo...@kernel.org wrote:
> > &g
On Thu, Sep 14, 2023 at 4:49 AM Leonardo Bras wrote:
>
> On Wed, Sep 13, 2023 at 05:37:01PM -0300, Leonardo Bras wrote:
> > On Sun, Sep 10, 2023 at 07:06:23AM -0400, Guo Ren wrote:
> > > On Sun, Sep 10, 2023 at 04:29:00AM -0400, guo...@kernel.org wrote:
On Thu, Sep 14, 2023 at 4:29 AM Leonardo Bras wrote:
>
> On Sun, Sep 10, 2023 at 04:28:59AM -0400, guo...@kernel.org wrote:
> > From: Guo Ren
> >
> > The requirements of qspinlock have been documented by commit:
> > a8ad07e5240c ("asm-generic: qspinl
On Wed, Sep 13, 2023 at 9:06 PM Waiman Long wrote:
>
> On 9/13/23 08:52, Guo Ren wrote:
> > On Wed, Sep 13, 2023 at 4:55 PM Leonardo Bras wrote:
> >> On Tue, Sep 12, 2023 at 09:10:08AM +0800, Guo Ren wrote:
> >>> On Mon, Sep 11, 2023 at 9:03 PM Waiman Long wr
On Thu, Sep 14, 2023 at 2:54 AM Palmer Dabbelt wrote:
>
> On Sun, 06 Aug 2023 22:23:34 PDT (-0700), sor...@fastmail.com wrote:
> > On Wed, Aug 2, 2023, at 12:46 PM, guo...@kernel.org wrote:
> >> From: Guo Ren
> >>
> >> According to qspinlock requ
On Wed, Sep 13, 2023 at 4:55 PM Leonardo Bras wrote:
>
> On Tue, Sep 12, 2023 at 09:10:08AM +0800, Guo Ren wrote:
> > On Mon, Sep 11, 2023 at 9:03 PM Waiman Long wrote:
> > >
> > > On 9/10/23 23:09, Guo Ren wrote:
> > > > On Mon, Sep 11, 2023 at 10:35 A
On Tue, Sep 12, 2023 at 3:05 AM Leonardo Brás wrote:
>
> On Sun, 2023-09-10 at 04:28 -0400, guo...@kernel.org wrote:
> > From: Guo Ren
> >
> > The arch_spinlock_t of qspinlock has contained the atomic_t val, which
> > satisfies the ticket-lock requirement. T
On Tue, Sep 12, 2023 at 4:08 PM Conor Dooley wrote:
>
> On Tue, Sep 12, 2023 at 09:33:57AM +0800, Guo Ren wrote:
> > On Mon, Sep 11, 2023 at 8:53 PM Conor Dooley
> > wrote:
>
> > > I added the new "riscv,isa-extensions" property in part to make
> &g
On Mon, Sep 11, 2023 at 8:53 PM Conor Dooley wrote:
>
> On Mon, Sep 11, 2023 at 11:36:27AM +0800, Guo Ren wrote:
> > On Mon, Sep 11, 2023 at 3:45 AM Conor Dooley wrote:
> > >
> > > On Sun, Sep 10, 2023 at 05:49:13PM +0800, Guo Ren wrote:
> > > > On
On Mon, Sep 11, 2023 at 11:22 PM Waiman Long wrote:
>
> On 9/10/23 04:29, guo...@kernel.org wrote:
> > From: Guo Ren
> >
> > Allow cmdline to force the kernel to use queued_spinlock when
> > CONFIG_RISCV_COMBO_SPINLOCKS=y.
> >
> > Signed-o
On Mon, Sep 11, 2023 at 9:03 PM Waiman Long wrote:
>
> On 9/10/23 23:09, Guo Ren wrote:
> > On Mon, Sep 11, 2023 at 10:35 AM Waiman Long wrote:
> >>
> >> On 9/10/23 04:28, guo...@kernel.org wrote:
> >>> From: Guo Ren
> >>>
> >>>
On Mon, Sep 11, 2023 at 11:34 PM Waiman Long wrote:
>
> On 9/10/23 04:29, guo...@kernel.org wrote:
> > From: Guo Ren
> >
> > Allow cmdline to force the kernel to use queued_spinlock when
> > CONFIG_RISCV_COMBO_SPINLOCKS=y.
> >
> > Signed-o
On Mon, Sep 11, 2023 at 3:45 AM Conor Dooley wrote:
>
> On Sun, Sep 10, 2023 at 05:49:13PM +0800, Guo Ren wrote:
> > On Sun, Sep 10, 2023 at 5:32 PM Conor Dooley wrote:
> > >
> > > On Sun, Sep 10, 2023 at 05:16:46PM +0800, Guo Ren wrote:
> > > > On
On Mon, Sep 11, 2023 at 10:35 AM Waiman Long wrote:
>
>
> On 9/10/23 04:28, guo...@kernel.org wrote:
> > From: Guo Ren
> >
> > The target of xchg_tail is to write the tail to the lock value, so
> > adding prefetchw could help the next cmpxchg step, which may
>
On Sun, Sep 10, 2023 at 04:29:00AM -0400, guo...@kernel.org wrote:
> From: Guo Ren
>
> Combo spinlock could support queued and ticket in one Linux Image and
> select them during boot time via errata mechanism. Here is the func
> size (Bytes) comparison table b
On Sun, Sep 10, 2023 at 5:32 PM Conor Dooley wrote:
>
> On Sun, Sep 10, 2023 at 05:16:46PM +0800, Guo Ren wrote:
> > On Sun, Sep 10, 2023 at 4:58 PM Conor Dooley wrote:
> > >
> > > On Sun, Sep 10, 2023 at 04:28:54AM -0400, guo...@kernel.org wrote:
>
On Sun, Sep 10, 2023 at 5:16 PM Guo Ren wrote:
>
> On Sun, Sep 10, 2023 at 4:58 PM Conor Dooley wrote:
> >
> > On Sun, Sep 10, 2023 at 04:28:54AM -0400, guo...@kernel.org wrote:
> >
> > > Changlog:
> > > V11:
> > > - Based on Leonardo Bras'
; A stronger forward progress guarantee is not an erratum, AFAICT.
Sorry, there is no erratum of "stronger forward progress guarantee" in the V11.
>
> > - Introduce prefetch.w to improve T-HEAD processors' LR/SC forward progress
> >guarantee.
> > - Optimize qspinlock xchg_tail when NR_CPUS >= 16K.
--
Best Regards
Guo Ren
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