From: Will Deacon <will.deacon@arm.com>
To: Rik van Riel <riel@surriel.com>
Cc: Nicholas Piggin <npiggin@gmail.com>,
Peter Zijlstra <peterz@infradead.org>,
torvalds@linux-foundation.org, luto@kernel.org, x86@kernel.org,
bp@alien8.de, jannh@google.com, ascannell@google.com,
dave.hansen@intel.com, linux-kernel@vger.kernel.org,
linux-mm@kvack.org, David Miller <davem@davemloft.net>,
Martin Schwidefsky <schwidefsky@de.ibm.com>,
Michael Ellerman <mpe@ellerman.id.au>,
linux-arch@vger.kernel.org
Subject: Re: [RFC PATCH 1/2] mm: move tlb_table_flush to tlb_flush_mmu_free
Date: Fri, 7 Sep 2018 14:44:00 +0100 [thread overview]
Message-ID: <20180907134359.GA12187@arm.com> (raw)
In-Reply-To: <fa7c625dfbbe103b37bc3ab5ea4b7283fd13b998.camel@surriel.com>
On Thu, Sep 06, 2018 at 04:29:59PM -0400, Rik van Riel wrote:
> On Thu, 2018-08-23 at 18:47 +1000, Nicholas Piggin wrote:
> > There is no need to call this from tlb_flush_mmu_tlbonly, it
> > logically belongs with tlb_flush_mmu_free. This allows some
> > code consolidation with a subsequent fix.
> >
> > Signed-off-by: Nicholas Piggin <npiggin@gmail.com>
>
> Reviewed-by: Rik van Riel <riel@surriel.com>
>
> This patch also fixes an infinite recursion bug
> with CONFIG_HAVE_RCU_TABLE_FREE enabled, which
> has this call trace:
>
> tlb_table_flush
> -> tlb_table_invalidate
> -> tlb_flush_mmu_tlbonly
> -> tlb_table_flush
> -> ... (infinite recursion)
>
> This should probably be applied sooner rather than
> later.
It's already in mainline with a cc stable afaict.
Will
next prev parent reply other threads:[~2018-09-07 13:44 UTC|newest]
Thread overview: 44+ messages / expand[flat|nested] mbox.gz Atom feed top
2018-08-23 8:47 [RFC PATCH 0/2] minor mmu_gather patches Nicholas Piggin
2018-08-23 8:47 ` [RFC PATCH 1/2] mm: move tlb_table_flush to tlb_flush_mmu_free Nicholas Piggin
2018-08-23 13:40 ` Will Deacon
2018-09-06 20:29 ` Rik van Riel
2018-09-07 13:44 ` Will Deacon [this message]
2018-09-07 14:28 ` Rik van Riel
2018-08-23 8:47 ` [RFC PATCH 2/2] mm: mmu_notifier fix for tlb_end_vma Nicholas Piggin
2018-08-23 12:46 ` Catalin Marinas
2018-08-23 13:41 ` Will Deacon
2018-08-24 13:07 ` [RFC PATCH 2/2] mm: mmu_notifier fix for tlb_end_vma (build failures) Guenter Roeck
2018-08-24 13:07 ` Guenter Roeck
2018-08-24 13:10 ` Will Deacon
2018-08-24 13:10 ` Will Deacon
2018-08-24 13:24 ` Guenter Roeck
2018-08-24 13:24 ` Guenter Roeck
2018-08-24 13:24 ` Guenter Roeck
2018-08-24 13:34 ` Will Deacon
2018-08-24 13:34 ` Will Deacon
2018-08-24 13:34 ` Will Deacon
2018-08-24 13:34 ` Will Deacon
2018-08-24 13:50 ` Will Deacon
2018-08-24 13:50 ` Will Deacon
2018-08-24 13:50 ` Will Deacon
2018-08-24 13:54 ` Guenter Roeck
2018-08-24 13:54 ` Guenter Roeck
2018-08-24 13:54 ` Guenter Roeck
2018-08-24 14:06 ` Guenter Roeck
2018-08-24 14:06 ` Guenter Roeck
2018-08-24 14:25 ` Will Deacon
2018-08-24 14:25 ` Will Deacon
2018-08-24 18:22 ` Guenter Roeck
2018-08-24 18:22 ` Guenter Roeck
2018-08-24 18:22 ` Guenter Roeck
2018-08-24 18:22 ` Guenter Roeck
2018-08-24 23:32 ` Palmer Dabbelt
2018-08-24 23:32 ` Palmer Dabbelt
2018-08-24 23:32 ` Palmer Dabbelt
2018-08-23 19:15 ` [RFC PATCH 0/2] minor mmu_gather patches Linus Torvalds
2018-08-23 19:37 ` Linus Torvalds
2018-08-23 23:27 ` Will Deacon
2018-08-23 23:27 ` Will Deacon
2018-08-23 23:42 ` Nicholas Piggin
2018-08-23 23:35 ` Nicholas Piggin
2018-08-24 8:05 ` Peter Zijlstra
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