On Tue, May 24, 2016 at 12:49:42AM +0300, Kirill A. Shutemov wrote:
> That's what we do now and that's not enough.
>
> We would need to serialize against pmd_lock() during normal page-fault
> path (and other pte manipulation), which we don't do now if pmd points to
> page table.
Yes, mmap_sem for
On Mon, May 23, 2016 at 04:13:03PM -0400, Rik van Riel wrote:
> On Mon, 2016-05-23 at 23:02 +0300, Kirill A. Shutemov wrote:
> > On Mon, May 23, 2016 at 03:26:47PM -0400, Rik van Riel wrote:
> > >
> > > On Mon, 2016-05-23 at 22:01 +0300, Kirill A. Shutemov wrote:
> > > >
> > > > On Mon, May 23, 2
On Mon, 2016-05-23 at 23:02 +0300, Kirill A. Shutemov wrote:
> On Mon, May 23, 2016 at 03:26:47PM -0400, Rik van Riel wrote:
> >
> > On Mon, 2016-05-23 at 22:01 +0300, Kirill A. Shutemov wrote:
> > >
> > > On Mon, May 23, 2016 at 02:49:09PM -0400, Rik van Riel wrote:
> > > >
> > > >
> > > > On
On Mon, May 23, 2016 at 03:26:47PM -0400, Rik van Riel wrote:
> On Mon, 2016-05-23 at 22:01 +0300, Kirill A. Shutemov wrote:
> > On Mon, May 23, 2016 at 02:49:09PM -0400, Rik van Riel wrote:
> > >
> > > On Mon, 2016-05-23 at 20:42 +0200, Michal Hocko wrote:
> > > >
> > > > On Mon 23-05-16 20:14:1
On Mon, 2016-05-23 at 22:01 +0300, Kirill A. Shutemov wrote:
> On Mon, May 23, 2016 at 02:49:09PM -0400, Rik van Riel wrote:
> >
> > On Mon, 2016-05-23 at 20:42 +0200, Michal Hocko wrote:
> > >
> > > On Mon 23-05-16 20:14:11, Ebru Akagunduz wrote:
> > > >
> > > >
> > > > Currently khugepaged ma
On Mon, May 23, 2016 at 02:49:09PM -0400, Rik van Riel wrote:
> On Mon, 2016-05-23 at 20:42 +0200, Michal Hocko wrote:
> > On Mon 23-05-16 20:14:11, Ebru Akagunduz wrote:
> > >
> > > Currently khugepaged makes swapin readahead under
> > > down_write. This patch supplies to make swapin
> > > readah
On Mon, 2016-05-23 at 20:42 +0200, Michal Hocko wrote:
> On Mon 23-05-16 20:14:11, Ebru Akagunduz wrote:
> >
> > Currently khugepaged makes swapin readahead under
> > down_write. This patch supplies to make swapin
> > readahead under down_read instead of down_write.
> You are still keeping down_wr
On Mon 23-05-16 20:14:11, Ebru Akagunduz wrote:
> Currently khugepaged makes swapin readahead under
> down_write. This patch supplies to make swapin
> readahead under down_read instead of down_write.
You are still keeping down_write. Can we do without it altogether?
Blocking mmap_sem of a remote p
On Mon, May 23, 2016 at 08:14:11PM +0300, Ebru Akagunduz wrote:
> Currently khugepaged makes swapin readahead under
> down_write. This patch supplies to make swapin
> readahead under down_read instead of down_write.
>
> The patch was tested with a test program that allocates
> 800MB of memory, wri
Currently khugepaged makes swapin readahead under
down_write. This patch supplies to make swapin
readahead under down_read instead of down_write.
The patch was tested with a test program that allocates
800MB of memory, writes to it, and then sleeps. The system
was forced to swap out all. Afterward
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