On Tue 26-05-15 01:08:56, Daniel Phillips wrote:
On Tuesday, May 26, 2015 12:09:10 AM PDT, Jan Kara wrote:
E.g. video drivers (or infiniband or direct IO for that matter) which
have buffers in user memory (may be mmapped file), grab references to pages
and hand out PFNs of those pages to the
On Mon 25-05-15 23:11:11, Daniel Phillips wrote:
On Monday, May 25, 2015 11:04:39 PM PDT, David Lang wrote:
if the page gets modified again, will that cause any issues? what
if the page gets modified before the copy gets written out, so
that there are two dirty copies of the page in the
On (05/26/15 01:08), Daniel Phillips wrote:
On Tuesday, May 26, 2015 12:09:10 AM PDT, Jan Kara wrote:
E.g. video drivers (or infiniband or direct IO for that matter) which
have buffers in user memory (may be mmapped file), grab references to pages
and hand out PFNs of those pages to the
On Tuesday, May 26, 2015 3:13:02 AM PDT, Pavel Machek wrote:
On Tue 2015-05-26 01:09:59, Daniel Phillips wrote:
On Monday, May 25, 2015 11:13:46 PM PDT, David Lang wrote:
I'm assuming that Rik is talking about whatever has the reference to the
page via one of the methods that he talked about.
On Tuesday, May 26, 2015 3:03:26 AM PDT, Pavel Machek wrote:
We identified the following quality metrics for this algorithm:
1) Never fails to detect out of space in the front end.
2) Always fills a volume to 100% before reporting out of space.
3) Allows rm, rmdir and truncate even when a
On 05/26/2015 02:00 AM, Jan Kara wrote:
On Tue 26-05-15 01:08:56, Daniel Phillips wrote:
On Tuesday, May 26, 2015 12:09:10 AM PDT, Jan Kara wrote:
E.g. video drivers (or infiniband or direct IO for that matter) which
have buffers in user memory (may be mmapped file), grab references to pages
Hi Sergey,
On 05/26/2015 03:22 AM, Sergey Senozhatsky wrote:
Hello,
is it possible to page-fork-bomb the system by some 'malicious' app?
Not in any new way. A page fork can happen either in the front end,
where it has to wait for memory like any other normal memory user,
or in the backend,
On 05/26/2015 04:22 PM, Daniel Phillips wrote:
On 05/26/2015 02:00 AM, Jan Kara wrote:
So my opinion is: Don't fork the page if page_count is elevated. You can
just wait for the IO if you need stable pages in that case. It's slow but
it's safe and it should be pretty rare. Is there any
