Long quote; please see below:
Eric B Munson wrote:
> Transparent huge pages (THP) give another option for access to huge pages for
> anonymous mappings. This patch adds the ability to specify that the process
> heap should be aligned and (if requested madvised) to be merged into huge
> pages
> b
Transparent huge pages (THP) give another option for access to huge pages for
anonymous mappings. This patch adds the ability to specify that the process
heap should be aligned and (if requested madvised) to be merged into huge pages
by khugepaged. For more information on THP see
linux-2.6/Docume
Eric,
On 07/11/11 10:51, Eric B Munson wrote:
> diff --git a/morecore.c b/morecore.c
> index 6b4364c..c2a445c 100644
> --- a/morecore.c
> +++ b/morecore.c
> @@ -202,6 +202,72 @@ static void *hugetlbfs_morecore(ptrdiff_t increment)
> return p;
> }
>
> +static void *thp_morecore(ptrdiff_t i
Transparent huge pages (THP) give another option for access to huge pages for
anonymous mappings. This patch adds the ability to specify that the process
heap should be aligned and (if requested madvised) to be merged into huge pages
by khugepaged. For more information on THP see
linux-2.6/Docume
Eric B Munson wrote:
> On Wed, 15 Jun 2011, Andrew Hastings wrote:
>> My opinion: There's no reason for HUGETLB_MORECORE=thp to _not_ do the
>> madvise. HUGETLB_MORECORE=thp should be implemented as a wrapper around
>> sbrk; it should _not_ add a gap to the heap.
>
> I am fine having madvise b
On Wed, Jun 15, 2011 at 10:29:26AM -0400, Eric B Munson wrote:
> On Wed, 15 Jun 2011, Andrew Hastings wrote:
> > My opinion: There's no reason for HUGETLB_MORECORE=thp to _not_ do
> > the madvise. HUGETLB_MORECORE=thp should be implemented as a
> > wrapper around sbrk; it should _not_ add a gap t
On Wed, 15 Jun 2011, Andrew Hastings wrote:
> Eric B Munson wrote:
> >It is true that you will end up with huge pages for the heap eventually
> >without
> >changing anything. khugepaged will promote areas it finds that are 2MB
> >aligned, etc. However, it is possible to have things _allocated_
Eric B Munson wrote:
> It is true that you will end up with huge pages for the heap eventually
> without
> changing anything. khugepaged will promote areas it finds that are 2MB
> aligned, etc. However, it is possible to have things _allocated_ as
> transparent huge pages without requiring promo
On Tue, 14 Jun 2011, David Gibson wrote:
> On Mon, Jun 13, 2011 at 09:06:16AM -0500, Andrew Hastings wrote:
> > On 06/08/2011 09:40 PM, Eric B Munson wrote:
> > > On Wed, Jun 8, 2011 at 8:50 PM, David Gibson
> > > wrote:
> [snip]
> > Actually, in thinking about this some more I wonder if the
>
On Mon, Jun 13, 2011 at 09:06:16AM -0500, Andrew Hastings wrote:
> On 06/08/2011 09:40 PM, Eric B Munson wrote:
> > On Wed, Jun 8, 2011 at 8:50 PM, David Gibson
> > wrote:
[snip]
> Actually, in thinking about this some more I wonder if the
> implementation ought to be using sbrk instead of mmap?
On 06/08/2011 09:40 PM, Eric B Munson wrote:
> On Wed, Jun 8, 2011 at 8:50 PM, David Gibson
> wrote:
>> On Wed, Jun 08, 2011 at 11:16:42AM -0500, Andrew Hastings wrote:
>>> On 06/07/11 11:08, Eric B Munson wrote:
On Fri, 03 Jun 2011, Andrew Hastings wrote:
>> [snip]
> Might it make sense
On Wed, Jun 8, 2011 at 8:50 PM, David Gibson
wrote:
> On Wed, Jun 08, 2011 at 11:16:42AM -0500, Andrew Hastings wrote:
>> On 06/07/11 11:08, Eric B Munson wrote:
>> > On Fri, 03 Jun 2011, Andrew Hastings wrote:
> [snip]
>> >> Might it make sense for HUGETLB_MORECORE=thp to automatically turn
>> >>
On Wed, Jun 08, 2011 at 11:16:42AM -0500, Andrew Hastings wrote:
> On 06/07/11 11:08, Eric B Munson wrote:
> > On Fri, 03 Jun 2011, Andrew Hastings wrote:
[snip]
> >> Might it make sense for HUGETLB_MORECORE=thp to automatically turn
> >> on the madvise(MADV_HUGEPAGE)? If necessary, a separate env
On 06/07/11 11:08, Eric B Munson wrote:
> On Fri, 03 Jun 2011, Andrew Hastings wrote:
>
>> Hello, Eric!
>>
>> On 05/26/2011 12:13 PM, Eric B Munson wrote:
>>> diff --git a/HOWTO b/HOWTO
>>> index 3c1f124..b018543 100644
>>> --- a/HOWTO
>>> +++ b/HOWTO
>>> @@ -2,7 +2,7 @@ libhugetlbfs HOWTO
>>> ==
On Fri, 03 Jun 2011, Andrew Hastings wrote:
> Hello, Eric!
>
> On 05/26/2011 12:13 PM, Eric B Munson wrote:
> >diff --git a/HOWTO b/HOWTO
> >index 3c1f124..b018543 100644
> >--- a/HOWTO
> >+++ b/HOWTO
> >@@ -2,7 +2,7 @@ libhugetlbfs HOWTO
> > ==
> >
> > Author: David Gibson, Ada
Hello, Eric!
On 05/26/2011 12:13 PM, Eric B Munson wrote:
> diff --git a/HOWTO b/HOWTO
> index 3c1f124..b018543 100644
> --- a/HOWTO
> +++ b/HOWTO
> @@ -2,7 +2,7 @@ libhugetlbfs HOWTO
> ==
>
> Author: David Gibson, Adam Litke, and
> others
> -Last updated: February 1st, 2011
>
Transparent huge pages (THP) give another option for access to huge pages for
anonymous mappings. This patch adds the ability to specify that the process
heap should be aligned and (if requested madvised) to be merged into huge pages
by khugepaged. For more information on THP see
linux-2.6/Docume
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