From: Peter Zijlstra <peterz@infradead.org>
To: "Aneesh Kumar K.V" <aneesh.kumar@linux.ibm.com>
Cc: akpm@linux-foundation.org, npiggin@gmail.com, mpe@ellerman.id.au,
will@kernel.org, linux-mm@kvack.org,
linux-kernel@vger.kernel.org, linuxppc-dev@lists.ozlabs.org,
linux-arch@vger.kernel.org
Subject: Re: [PATCH v2 1/3] powerpc/mmu_gather: Enable RCU_TABLE_FREE even for !SMP case
Date: Wed, 18 Dec 2019 10:14:54 +0100 [thread overview]
Message-ID: <20191218091454.GN2844@hirez.programming.kicks-ass.net> (raw)
In-Reply-To: <20191218053530.73053-1-aneesh.kumar@linux.ibm.com>
I'm going to assume you'll take these 3 patches through the powerpc tree
for convenience, a few small nits, but otherwise ACK on the lot.
On Wed, Dec 18, 2019 at 11:05:28AM +0530, Aneesh Kumar K.V wrote:
> A follow up patch is going to make sure we correctly invalidate page walk cache
> before we free page table pages. In order to keep things simple enable
> RCU_TABLE_FREE even for !SMP so that we don't have to fixup the !SMP case
> differently in the followup patch
Perhaps more clearly state that !SMP is broken for Radix/PWC. The above
sorta implies it is, but it's not spelled out in any detail.
> Signed-off-by: Aneesh Kumar K.V <aneesh.kumar@linux.ibm.com>
Acked-by: Peter Zijlstra (Intel) <peterz@infradead.org>
WARNING: multiple messages have this Message-ID (diff)
From: Peter Zijlstra <peterz@infradead.org>
To: "Aneesh Kumar K.V" <aneesh.kumar@linux.ibm.com>
Cc: linux-arch@vger.kernel.org, linuxppc-dev@lists.ozlabs.org,
linux-kernel@vger.kernel.org, npiggin@gmail.com,
linux-mm@kvack.org, akpm@linux-foundation.org, will@kernel.org
Subject: Re: [PATCH v2 1/3] powerpc/mmu_gather: Enable RCU_TABLE_FREE even for !SMP case
Date: Wed, 18 Dec 2019 10:14:54 +0100 [thread overview]
Message-ID: <20191218091454.GN2844@hirez.programming.kicks-ass.net> (raw)
In-Reply-To: <20191218053530.73053-1-aneesh.kumar@linux.ibm.com>
I'm going to assume you'll take these 3 patches through the powerpc tree
for convenience, a few small nits, but otherwise ACK on the lot.
On Wed, Dec 18, 2019 at 11:05:28AM +0530, Aneesh Kumar K.V wrote:
> A follow up patch is going to make sure we correctly invalidate page walk cache
> before we free page table pages. In order to keep things simple enable
> RCU_TABLE_FREE even for !SMP so that we don't have to fixup the !SMP case
> differently in the followup patch
Perhaps more clearly state that !SMP is broken for Radix/PWC. The above
sorta implies it is, but it's not spelled out in any detail.
> Signed-off-by: Aneesh Kumar K.V <aneesh.kumar@linux.ibm.com>
Acked-by: Peter Zijlstra (Intel) <peterz@infradead.org>
next prev parent reply other threads:[~2019-12-18 9:15 UTC|newest]
Thread overview: 18+ messages / expand[flat|nested] mbox.gz Atom feed top
2019-12-18 5:35 [PATCH v2 1/3] powerpc/mmu_gather: Enable RCU_TABLE_FREE even for !SMP case Aneesh Kumar K.V
2019-12-18 5:35 ` Aneesh Kumar K.V
2019-12-18 5:35 ` [PATCH v2 2/3] mm/mmu_gather: Invalidate TLB correctly on batch allocation failure and flush Aneesh Kumar K.V
2019-12-18 5:35 ` Aneesh Kumar K.V
2019-12-18 9:17 ` Peter Zijlstra
2019-12-18 9:17 ` Peter Zijlstra
2019-12-18 11:37 ` Aneesh Kumar K.V
2019-12-18 11:37 ` Aneesh Kumar K.V
2019-12-18 13:13 ` Michael Ellerman
2019-12-18 13:13 ` Michael Ellerman
2019-12-18 14:15 ` Peter Zijlstra
2019-12-18 14:15 ` Peter Zijlstra
2019-12-18 5:35 ` [PATCH v2 3/3] asm-generic/tlb: Avoid potential double flush Aneesh Kumar K.V
2019-12-18 5:35 ` Aneesh Kumar K.V
2019-12-18 9:19 ` Peter Zijlstra
2019-12-18 9:19 ` Peter Zijlstra
2019-12-18 9:14 ` Peter Zijlstra [this message]
2019-12-18 9:14 ` [PATCH v2 1/3] powerpc/mmu_gather: Enable RCU_TABLE_FREE even for !SMP case Peter Zijlstra
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