From: Peter Zijlstra <peterz@infradead.org>
To: Will Deacon <will.deacon@arm.com>
Cc: "Kirill A. Shutemov" <kirill@shutemov.name>,
Andrew Morton <akpm@linux-foundation.org>,
"Kirill A. Shutemov" <kirill.shutemov@linux.intel.com>,
Ingo Molnar <mingo@redhat.com>,
"linux-kernel@vger.kernel.org" <linux-kernel@vger.kernel.org>,
"linux-mm@kvack.org" <linux-mm@kvack.org>,
"linux-arch@vger.kernel.org" <linux-arch@vger.kernel.org>
Subject: Re: [PATCH] mm: create a separate slab for page->ptl allocation
Date: Wed, 6 Nov 2013 12:02:00 +0100 [thread overview]
Message-ID: <20131106110200.GI10651@twins.programming.kicks-ass.net> (raw)
In-Reply-To: <20131106103403.GB21074@mudshark.cambridge.arm.com>
On Wed, Nov 06, 2013 at 10:34:03AM +0000, Will Deacon wrote:
> FWIW: if the architecture selects ARCH_USE_CMPXCHG_LOCKREF, then a spinlock_t
> is 32-bit (assuming that unsigned int is also 32-bit).
Egads, talk about fragile. That thing relies on someone actually keeping
lib/Kconfig up-to-date.
WARNING: multiple messages have this Message-ID (diff)
From: Peter Zijlstra <peterz@infradead.org>
To: Will Deacon <will.deacon@arm.com>
Cc: "Kirill A. Shutemov" <kirill@shutemov.name>,
Andrew Morton <akpm@linux-foundation.org>,
"Kirill A. Shutemov" <kirill.shutemov@linux.intel.com>,
Ingo Molnar <mingo@redhat.com>,
"linux-kernel@vger.kernel.org" <linux-kernel@vger.kernel.org>,
"linux-mm@kvack.org" <linux-mm@kvack.org>,
"linux-arch@vger.kernel.org" <linux-arch@vger.kernel.org>
Subject: Re: [PATCH] mm: create a separate slab for page->ptl allocation
Date: Wed, 6 Nov 2013 12:02:00 +0100 [thread overview]
Message-ID: <20131106110200.GI10651@twins.programming.kicks-ass.net> (raw)
In-Reply-To: <20131106103403.GB21074@mudshark.cambridge.arm.com>
On Wed, Nov 06, 2013 at 10:34:03AM +0000, Will Deacon wrote:
> FWIW: if the architecture selects ARCH_USE_CMPXCHG_LOCKREF, then a spinlock_t
> is 32-bit (assuming that unsigned int is also 32-bit).
Egads, talk about fragile. That thing relies on someone actually keeping
lib/Kconfig up-to-date.
--
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next prev parent reply other threads:[~2013-11-06 11:02 UTC|newest]
Thread overview: 34+ messages / expand[flat|nested] mbox.gz Atom feed top
2013-10-22 11:53 [PATCH] mm: create a separate slab for page->ptl allocation Kirill A. Shutemov
2013-10-22 11:53 ` Kirill A. Shutemov
2013-10-22 12:55 ` Fengguang Wu
2013-10-22 12:55 ` Fengguang Wu
2013-11-04 10:42 ` Kirill A. Shutemov
2013-11-04 10:42 ` Kirill A. Shutemov
2013-11-05 23:01 ` Andrew Morton
2013-11-05 23:01 ` Andrew Morton
2013-11-05 22:42 ` Kirill A. Shutemov
2013-11-05 22:42 ` Kirill A. Shutemov
2013-11-05 23:56 ` Andrew Morton
2013-11-05 23:56 ` Andrew Morton
2013-11-05 23:13 ` Kirill A. Shutemov
2013-11-05 23:13 ` Kirill A. Shutemov
2013-11-06 0:43 ` Andrew Morton
2013-11-06 0:43 ` Andrew Morton
2013-11-06 9:31 ` Peter Zijlstra
2013-11-06 9:31 ` Peter Zijlstra
2013-11-06 11:18 ` Peter Zijlstra
2013-11-06 11:18 ` Peter Zijlstra
2013-11-06 13:31 ` lockref: Use bloated_spinlocks to avoid explicit config dependencies Kirill A. Shutemov
2013-11-06 13:31 ` Kirill A. Shutemov
2013-11-06 14:32 ` Peter Zijlstra
2013-11-06 14:32 ` Peter Zijlstra
2013-11-06 13:21 ` [PATCH] mm: create a separate slab for page->ptl allocation Kirill A. Shutemov
2013-11-06 13:21 ` Kirill A. Shutemov
2013-11-06 14:30 ` Peter Zijlstra
2013-11-06 14:30 ` Peter Zijlstra
2013-11-06 10:34 ` Will Deacon
2013-11-06 10:34 ` Will Deacon
2013-11-06 10:49 ` Geert Uytterhoeven
2013-11-06 10:49 ` Geert Uytterhoeven
2013-11-06 11:02 ` Peter Zijlstra [this message]
2013-11-06 11:02 ` Peter Zijlstra
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