From: Alex Shi <alex.shi@intel.com>
To: Peter Zijlstra <a.p.zijlstra@chello.nl>
Cc: Jan Beulich <JBeulich@suse.com>,
borislav.petkov@amd.com, arnd@arndb.de, akinobu.mita@gmail.com,
eric.dumazet@gmail.com, fweisbec@gmail.com, rostedt@goodmis.org,
hughd@google.com, jeremy@goop.org, len.brown@intel.com,
tony.luck@intel.com, yongjie.ren@intel.com,
kamezawa.hiroyu@jp.fujitsu.com, seto.hidetoshi@jp.fujitsu.com,
penberg@kernel.org, yinghai@kernel.org, tglx@linutronix.de,
akpm@linux-foundation.org, ak@linux.intel.com, luto@mit.edu,
avi@redhat.com, dhowells@redhat.com, mingo@redhat.com,
riel@redhat.com, cpw@sgi.com, steiner@sgi.com,
linux-kernel@vger.kernel.org, viro@zeniv.linux.org.uk,
hpa@zytor.com, Rusty Russell <rusty@rustcorp.com.au>
Subject: Re: [PATCH v7 8/8] x86/tlb: just do tlb flush on one of siblings of SMT
Date: Thu, 24 May 2012 17:27:45 +0800 [thread overview]
Message-ID: <4FBDFF11.7030105@intel.com> (raw)
In-Reply-To: <1337848970.9783.72.camel@laptop>
On 05/24/2012 04:42 PM, Peter Zijlstra wrote:
> On Thu, 2012-05-24 at 16:32 +0800, Alex Shi wrote:
>> So, I use cpumask_t in stack.
>
> cpumask_t is 512 bytes with NR_CPUS=4096, that's generally considered
> too big to be on stack.
I am not consistent with cpumask_t.
I just want to know why it is too big on stack? Since if it causes
trouble in using, that mean current kernel will fail to run on 4096 CPU
system.
next prev parent reply other threads:[~2012-05-24 9:29 UTC|newest]
Thread overview: 48+ messages / expand[flat|nested] mbox.gz Atom feed top
2012-05-23 14:15 [PATCH v7 0/8] x86 tlb optimisations Alex Shi
2012-05-23 14:15 ` [PATCH v7 1/8] x86/tlb_info: get last level TLB entry number of CPU Alex Shi
2012-05-23 14:15 ` [PATCH v7 2/8] x86/flush_tlb: try flush_tlb_single one by one in flush_tlb_range Alex Shi
2012-05-23 14:51 ` Jan Beulich
2012-05-24 6:41 ` Alex Shi
2012-05-24 8:12 ` Jan Beulich
2012-05-24 8:55 ` Alex Shi
2012-05-24 9:44 ` Jan Beulich
2012-05-24 14:36 ` Alex Shi
2012-05-25 2:43 ` Alex Shi
2012-05-23 14:15 ` [PATCH v7 3/8] x86/tlb: fall back to flush all when meet a THP large page Alex Shi
2012-05-23 14:15 ` [PATCH v7 4/8] x86/tlb: add tlb_flushall_shift for specific CPU Alex Shi
2012-05-23 14:15 ` [PATCH v7 5/8] x86/tlb: enable tlb flush range support for generic mmu and x86 Alex Shi
2012-05-23 14:15 ` [PATCH v7 6/8] x86/tlb: add tlb_flushall_shift knob into debugfs Alex Shi
2012-05-23 14:15 ` [PATCH v7 7/8] x86/tlb: replace INVALIDATE_TLB_VECTOR by CALL_FUNCTION_VECTOR Alex Shi
2012-05-23 14:15 ` [PATCH v7 8/8] x86/tlb: just do tlb flush on one of siblings of SMT Alex Shi
2012-05-23 15:05 ` Jan Beulich
2012-05-23 17:09 ` Peter Zijlstra
2012-05-23 17:15 ` Peter Zijlstra
2012-05-24 1:46 ` Andrew Lutomirski
2012-05-24 5:12 ` Alex Shi
2012-05-24 6:04 ` Borislav Petkov
2012-05-24 7:40 ` Peter Zijlstra
2012-05-24 13:19 ` Andrew Lutomirski
2012-05-24 13:23 ` Peter Zijlstra
2012-05-24 13:39 ` Arjan van de Ven
2012-05-24 13:54 ` Alex Shi
2012-05-24 14:18 ` Arjan van de Ven
2012-05-24 14:32 ` Alex Shi
2012-05-24 15:03 ` H. Peter Anvin
2012-05-25 0:24 ` Alex Shi
2012-05-24 16:08 ` Arjan van de Ven
2012-05-25 0:28 ` Alex Shi
2012-05-25 0:46 ` Arjan van de Ven
2012-05-24 8:32 ` Alex Shi
2012-05-24 8:42 ` Peter Zijlstra
2012-05-24 8:48 ` Alex Shi
2012-05-24 11:35 ` Rusty Russell
2012-05-24 14:03 ` Alex Shi
2012-05-24 9:27 ` Alex Shi [this message]
2012-05-24 9:42 ` Peter Zijlstra
2012-05-24 9:46 ` Jan Beulich
2012-05-24 14:06 ` Alex Shi
2012-05-24 8:43 ` Peter Zijlstra
2012-05-24 8:48 ` Jan Beulich
2012-05-24 9:02 ` Alex Shi
2012-05-24 9:45 ` Jan Beulich
2012-05-24 15:04 ` H. Peter Anvin
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