From: Dave Hansen <dave.hansen@linux.intel.com>
To: Boaz Harrosh <boazh@netapp.com>, Jeff Moyer <jmoyer@redhat.com>,
Andrew Morton <akpm@linux-foundation.org>,
"Kirill A. Shutemov" <kirill.shutemov@linux.intel.com>,
linux-kernel <linux-kernel@vger.kernel.org>,
linux-fsdevel <linux-fsdevel@vger.kernel.org>,
"linux-mm@kvack.org" <linux-mm@kvack.org>
Cc: Thomas Gleixner <tglx@linutronix.de>,
Ingo Molnar <mingo@redhat.com>, "H. Peter Anvin" <hpa@zytor.com>,
x86@kernel.org, Peter Zijlstra <peterz@infradead.org>,
Rik van Riel <riel@redhat.com>, Jan Kara <jack@suse.cz>,
Matthew Wilcox <mawilcox@microsoft.com>,
Amit Golander <Amit.Golander@netapp.com>
Subject: Re: [PATCH] mm: Add new vma flag VM_LOCAL_CPU
Date: Tue, 15 May 2018 07:19:38 -0700 [thread overview]
Message-ID: <428e2683-42df-c810-eb5f-0c6841f50836@linux.intel.com> (raw)
In-Reply-To: <0efb5547-9250-6b6c-fe8e-cf4f44aaa5eb@netapp.com>
On 05/14/2018 10:28 AM, Boaz Harrosh wrote:
> The VM_LOCAL_CPU flag tells the Kernel that the vma will be used
> from a single-core only, and therefore invalidation (flush_tlb) of
> PTE(s) need not be a wide CPU scheduling.
This doesn't work on x86. We load TLB entries for lots of reasons, even
if the PTE is never "used". Is there another architecture you had in
mind that has more predictable TLB population behavior?
prev parent reply other threads:[~2018-05-15 14:19 UTC|newest]
Thread overview: 41+ messages / expand[flat|nested] mbox.gz Atom feed top
2018-05-14 17:28 [PATCH] mm: Add new vma flag VM_LOCAL_CPU Boaz Harrosh
2018-05-14 18:26 ` Boaz Harrosh
2018-05-15 7:08 ` Christoph Hellwig
2018-05-15 10:45 ` Boaz Harrosh
2018-05-14 19:15 ` Matthew Wilcox
2018-05-14 19:37 ` Boaz Harrosh
2018-05-15 0:41 ` Matthew Wilcox
2018-05-15 10:43 ` Boaz Harrosh
2018-05-15 11:11 ` Matthew Wilcox
2018-05-15 11:41 ` Boaz Harrosh
2018-05-15 12:03 ` Matthew Wilcox
2018-05-15 13:29 ` Boaz Harrosh
2018-05-15 13:50 ` Matthew Wilcox
2018-05-15 14:10 ` Boaz Harrosh
2018-05-15 14:18 ` Matthew Wilcox
2018-05-15 14:30 ` Boaz Harrosh
2018-05-15 12:09 ` Peter Zijlstra
2018-05-15 12:31 ` Boaz Harrosh
2018-05-15 11:47 ` Peter Zijlstra
2018-05-15 12:01 ` Boaz Harrosh
2018-05-15 12:07 ` Mark Rutland
2018-05-15 12:35 ` Peter Zijlstra
2018-05-15 13:19 ` Boaz Harrosh
2018-05-18 14:14 ` Christopher Lameter
2018-05-22 16:05 ` Boaz Harrosh
2018-05-22 16:18 ` Dave Hansen
2018-05-22 16:46 ` Christopher Lameter
2018-05-22 16:56 ` Peter Zijlstra
2018-05-22 17:03 ` Dave Hansen
2018-05-22 17:35 ` Christopher Lameter
2018-05-22 17:51 ` Matthew Wilcox
2018-05-23 17:30 ` Dave Hansen
2018-05-23 17:46 ` Nadav Amit
2018-05-23 18:10 ` Mark Rutland
2018-05-14 21:49 ` Andrew Morton
2018-05-15 0:44 ` Matthew Wilcox
2018-05-15 11:54 ` Boaz Harrosh
2018-05-15 13:24 ` Boaz Harrosh
2018-05-15 14:17 ` Peter Zijlstra
2018-05-15 14:36 ` Boaz Harrosh
2018-05-15 14:19 ` Dave Hansen [this message]
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