Hi Konstantin, Thanks very much for continuing to look at this! It's very much appreciated. I've been investigating from our end but got caught up in some gnarly details of our pagemap-consuming code. I like the approach and it seems like the information you're exposing will be useful for our application. I'll test the patch and see if it works for us as-is. Will follow up with any comments on the individual patches. Thanks, Mark On Tue, May 12, 2015 at 10:43 AM, Konstantin Khlebnikov <khlebnikov@xxxxxxxxxxxxxx> wrote: > This patchset tries to make pagemap useable again in the safe way. > First patch adds bit 'map-exlusive' which is set if page is mapped only here. > Second patch restores access for non-privileged users but hides pfn if task > has no capability CAP_SYS_ADMIN. Third patch removes page-shift bits and > completes migration to the new pagemap format (flags soft-dirty and > mmap-exlusive are available only in the new format). > > --- > > Konstantin Khlebnikov (3): > pagemap: add mmap-exclusive bit for marking pages mapped only here > pagemap: hide physical addresses from non-privileged users > pagemap: switch to the new format and do some cleanup > > > Documentation/vm/pagemap.txt | 3 - > fs/proc/task_mmu.c | 178 +++++++++++++++++------------------------- > tools/vm/page-types.c | 35 ++++---- > 3 files changed, 91 insertions(+), 125 deletions(-) -- To unsubscribe from this list: send the line "unsubscribe linux-api" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
