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From: "Aneesh Kumar K.V" <aneesh.kumar@linux.vnet.ibm.com>
To: Michael Ellerman <mpe@ellerman.id.au>,
	benh@kernel.crashing.org, paulus@samba.org
Cc: linuxppc-dev@lists.ozlabs.org,
	"Kirill A . Shutemov" <kirill.shutemov@linux.intel.com>,
	linux-mm@kvack.org, Andrew Morton <akpm@linux-foundation.org>
Subject: Re: [PATCH V5 16/17] mm: Let arch choose the initial value of task size
Date: Tue, 28 Mar 2017 20:52:58 +0530	[thread overview]
Message-ID: <6c8904b5-c4a0-b828-6aad-14220efc5236@linux.vnet.ibm.com> (raw)
In-Reply-To: <87vaqtabw8.fsf@concordia.ellerman.id.au>



On Tuesday 28 March 2017 04:47 PM, Michael Ellerman wrote:
> "Aneesh Kumar K.V" <aneesh.kumar@linux.vnet.ibm.com> writes:
>
>> As we start supporting larger address space (>128TB), we want to give
>> architecture a control on max task size of an application which is different
>> from the TASK_SIZE. For ex: ppc64 needs to track the base page size of a segment
>> and it is copied from mm_context_t to PACA on each context switch. If we know that
>> application has not used an address range above 128TB we only need to copy
>> details about 128TB range to PACA. This will help in improving context switch
>> performance by avoiding larger copy operation.
>>
>> Cc: Kirill A. Shutemov <kirill.shutemov@linux.intel.com>
>> Cc: linux-mm@kvack.org
>> Cc: Andrew Morton <akpm@linux-foundation.org>
>> Signed-off-by: Aneesh Kumar K.V <aneesh.kumar@linux.vnet.ibm.com>
>> ---
>>  fs/exec.c | 10 +++++++++-
>>  1 file changed, 9 insertions(+), 1 deletion(-)
>
> I'll need an ACK at least on this from someone in mm land.
>
> I assume there's no way I can merge patch 17 without this?

That is correct.

I didn't add linux-mm to cc for rest of the patches. They are all ppc64 
specific and can be found at

https://lists.ozlabs.org/pipermail/linuxppc-dev/2017-March/155726.html


-aneesh

  reply	other threads:[~2017-03-28 15:23 UTC|newest]

Thread overview: 27+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2017-03-22  3:36 [PATCH V5 00/17] powerpc/mm/ppc64: Add 128TB support Aneesh Kumar K.V
2017-03-22  3:36 ` [PATCH V5 01/17] powerpc/mm/slice: Convert slice_mask high slice to a bitmap Aneesh Kumar K.V
2017-03-29  3:11   ` Paul Mackerras
2017-03-29  5:20     ` Aneesh Kumar K.V
2017-03-22  3:36 ` [PATCH V5 02/17] powerpc/mm/slice: Update the function prototype Aneesh Kumar K.V
2017-03-29  3:43   ` Paul Mackerras
2017-03-29 10:48     ` Aneesh Kumar K.V
2017-03-22  3:36 ` [PATCH V5 03/17] powerpc/mm: Move copy_mm_to_paca to paca.c Aneesh Kumar K.V
2017-03-22  3:36 ` [PATCH V5 04/17] powerpc/mm: Remove redundant TASK_SIZE_USER64 checks Aneesh Kumar K.V
2017-03-29  3:34   ` Michael Ellerman
2017-03-22  3:36 ` [PATCH V5 05/17] powerpc/mm/slice: Move slice_mask struct definition to slice.c Aneesh Kumar K.V
2017-03-22  3:36 ` [PATCH V5 06/17] powerpc/mm/slice: Update slice mask printing to use bitmap printing Aneesh Kumar K.V
2017-03-22  3:36 ` [PATCH V5 07/17] powerpc/mm/hash: Move kernel context to the starting of context range Aneesh Kumar K.V
2017-03-22  3:36 ` [PATCH V5 08/17] powerpc/mm/hash: Support 68 bit VA Aneesh Kumar K.V
2017-03-22  3:36 ` [PATCH V5 09/17] powerpc/mm/hash: VSID 0 is no more an invalid VSID Aneesh Kumar K.V
2017-03-22  3:36 ` [PATCH V5 10/17] powerpc/mm/hash: Convert mask to unsigned long Aneesh Kumar K.V
2017-03-22  3:36 ` [PATCH V5 11/17] powerpc/mm/hash: Increase VA range to 128TB Aneesh Kumar K.V
2017-03-22  3:36 ` [PATCH V5 12/17] powerpc/mm/slice: Use mm task_size as max value of slice index Aneesh Kumar K.V
2017-03-22  3:36 ` [PATCH V5 13/17] powerpc/mm/hash: Store task size in PACA Aneesh Kumar K.V
2017-03-22  3:37 ` [PATCH V5 14/17] powerpc/mm/hash: Skip using reserved virtual address range Aneesh Kumar K.V
2017-03-22  3:37 ` [PATCH V5 15/17] powerpc/mm: Switch TASK_SIZE check to use mm->task_size Aneesh Kumar K.V
2017-03-22  3:37 ` [PATCH V5 16/17] mm: Let arch choose the initial value of task size Aneesh Kumar K.V
2017-03-28 11:17   ` Michael Ellerman
2017-03-28 15:22     ` Aneesh Kumar K.V [this message]
2017-03-29  9:20   ` Anshuman Khandual
2017-03-30  3:03   ` Anshuman Khandual
2017-03-22  3:37 ` [PATCH V5 17/17] powerpc/mm: Enable mappings above 128TB Aneesh Kumar K.V

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