lkml.org 
[lkml]   [2019]   [May]   [21]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
/
Date
From
SubjectRe: [RFC 4/7] mm: factor out madvise's core functionality
Hi.

On Tue, May 21, 2019 at 08:50:00AM +0200, Michal Hocko wrote:
> On Tue 21-05-19 08:36:28, Oleksandr Natalenko wrote:
> [...]
> > Regarding restricting the hints, I'm definitely interested in having
> > remote MADV_MERGEABLE/MADV_UNMERGEABLE. But, OTOH, doing it via remote
> > madvise() introduces another issue with traversing remote VMAs reliably.
> > IIUC, one can do this via userspace by parsing [s]maps file only, which
> > is not very consistent, and once some range is parsed, and then it is
> > immediately gone, a wrong hint will be sent.
> >
> > Isn't this a problem we should worry about?
>
> See http://lkml.kernel.org/r/20190520091829.GY6836@dhcp22.suse.cz

Oh, thanks for the pointer.

Indeed, for my specific task with remote KSM I'd go with map_files
instead. This doesn't solve the task completely in case of traversal
through all the VMAs in one pass, but makes it easier comparing to a
remote syscall.

--
Best regards,
Oleksandr Natalenko (post-factum)
Senior Software Maintenance Engineer

\
 
 \ /
  Last update: 2019-05-21 09:07    [W:0.358 / U:1.100 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site