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On 05/31/2016 02:01 AM, Minchan Kim wrote: > Per Vlastimi's review comment. > > Thanks for the detail review, Vlastimi! > If you have another concern, feel free to say. I don't for now :) [...] > Cc: Rik van Riel <riel at redhat.com> > Cc: Vlastimil Babka <vbabka at suse.cz> > Cc: Joonsoo Kim <iamjoonsoo.kim at lge.com> > Cc: Mel Gorman <mgorman at suse.de> > Cc: Hugh Dickins <hughd at google.com> > Cc: Rafael Aquini <aquini at redhat.com> > Cc: virtualization at lists.linux-foundation.org > Cc: Jonathan Corbet &...

On 05/31/2016 02:01 AM, Minchan Kim wrote: > Per Vlastimi's review comment. > > Thanks for the detail review, Vlastimi! > If you have another concern, feel free to say. I don't for now :) [...] > Cc: Rik van Riel <riel at redhat.com> > Cc: Vlastimil Babka <vbabka at suse.cz> > Cc: Joonsoo Kim <iamjoonsoo.kim at lge.com> > Cc: Mel Gorman <mgorman at suse.de> > Cc: Hugh Dickins <hughd at google.com> > Cc: Rafael Aquini <aquini at redhat.com> > Cc: virtualization at lists.linux-foundation.org > Cc: Jonathan Corbet &...

..._page only on failure. That makes code more readable > and doesn't add overhead in put_page. I had an idea of checking for count==1 in putback_lru_page() which would take the put_page() shortcut from there. But maybe it can't be done nicely without races. > Cc: Vlastimil Babka <vbabka at suse.cz> > Cc: Mel Gorman <mgorman at suse.de> > Cc: Hugh Dickins <hughd at google.com> > Cc: Naoya Horiguchi <n-horiguchi at ah.jp.nec.com> > Signed-off-by: Minchan Kim <minchan at kernel.org> Acked-by: Vlastimil Babka <vbabka at suse.cz> Note in -...

..._page only on failure. That makes code more readable > and doesn't add overhead in put_page. I had an idea of checking for count==1 in putback_lru_page() which would take the put_page() shortcut from there. But maybe it can't be done nicely without races. > Cc: Vlastimil Babka <vbabka at suse.cz> > Cc: Mel Gorman <mgorman at suse.de> > Cc: Hugh Dickins <hughd at google.com> > Cc: Naoya Horiguchi <n-horiguchi at ah.jp.nec.com> > Signed-off-by: Minchan Kim <minchan at kernel.org> Acked-by: Vlastimil Babka <vbabka at suse.cz> Note in -...

...ge() which > would take the put_page() shortcut from there. But maybe it can't be > done nicely without races. I thought about it and we might do it via page_freeze_refs but what I want at this moment is to separte two semantic put and putback. ;-) > > >Cc: Vlastimil Babka <vbabka at suse.cz> > >Cc: Mel Gorman <mgorman at suse.de> > >Cc: Hugh Dickins <hughd at google.com> > >Cc: Naoya Horiguchi <n-horiguchi at ah.jp.nec.com> > >Signed-off-by: Minchan Kim <minchan at kernel.org> > > Acked-by: Vlastimil Babka <vbabka...

...on users) has to drain > the lru pvec... Getting rid of this stuff is worth even by itself." > > Cc: Mel Gorman <mgorman at suse.de> > Cc: Hugh Dickins <hughd at google.com> > Cc: Naoya Horiguchi <n-horiguchi at ah.jp.nec.com> > Acked-by: Vlastimil Babka <vbabka at suse.cz> > Signed-off-by: Minchan Kim <minchan at kernel.org> [...] > @@ -974,28 +986,28 @@ static ICE_noinline int unmap_and_move(new_page_t get_new_page, > list_del(&page->lru); > dec_zone_page_state(page, NR_ISOLATED_ANON + > page_is_file_cache(p...

...on users) has to drain > the lru pvec... Getting rid of this stuff is worth even by itself." > > Cc: Mel Gorman <mgorman at suse.de> > Cc: Hugh Dickins <hughd at google.com> > Cc: Naoya Horiguchi <n-horiguchi at ah.jp.nec.com> > Acked-by: Vlastimil Babka <vbabka at suse.cz> > Signed-off-by: Minchan Kim <minchan at kernel.org> [...] > @@ -974,28 +986,28 @@ static ICE_noinline int unmap_and_move(new_page_t get_new_page, > list_del(&page->lru); > dec_zone_page_state(page, NR_ISOLATED_ANON + > page_is_file_cache(p...

...I can understand that this one is slightly different by requesting a specific range of the memory but it is still under a full control of the core MM to say no. > Cc: Andrew Morton <akpm at linux-foundation.org> > Cc: Michal Hocko <mhocko at suse.com> > Cc: Vlastimil Babka <vbabka at suse.cz> > Cc: Oscar Salvador <osalvador at suse.de> > Cc: Mel Gorman <mgorman at techsingularity.net> > Cc: Mike Rapoport <rppt at linux.ibm.com> > Cc: Dan Williams <dan.j.williams at intel.com> > Cc: Alexander Duyck <alexander.h.duyck at linux.intel...

This is based on Linux 5.7, plus one prerequisite patch: "mm/gup: update pin_user_pages.rst for "case 3" (mmu notifiers)" [1] Changes since v1: removed references to set_page_dirty*(), in response to Souptick Joarder's review (thanks!). Cover letter for v1, edited/updated slightly: It recently became clear to me that there are some get_user_pages*() callers that

This patchset is for kernel and contains two parts of change to the virtio-balloon. One is the change for speeding up the inflating & deflating process, the main idea of this optimization is to use bitmap to send the page information to host instead of the PFNs, to reduce the overhead of virtio data transmission, address translation and madvise(). This can help to improve the performance by

This patchset is for kernel and contains two parts of change to the virtio-balloon. One is the change for speeding up the inflating & deflating process, the main idea of this optimization is to use bitmap to send the page information to host instead of the PFNs, to reduce the overhead of virtio data transmission, address translation and madvise(). This can help to improve the performance by

Hi, It recently became clear to me that there are some get_user_pages*() callers that don't fit neatly into any of the four cases that are so far listed in pin_user_pages.rst. vhost.c is one of those. Add a Case 5 to the documentation, and refer to that when converting vhost.c. Thanks to Jan Kara for helping me (again) in understanding the interaction between get_user_pages() and page

Expose the function to get the max pfn, so it can be used in the virtio-balloon device driver. Signed-off-by: Liang Li <liang.z.li at intel.com> Cc: Andrew Morton <akpm at linux-foundation.org> Cc: Vlastimil Babka <vbabka at suse.cz> Cc: Mel Gorman <mgorman at techsingularity.net> Cc: Michael S. Tsirkin <mst at redhat.com> Cc: Paolo Bonzini <pbonzini at redhat.com> Cc: Cornelia Huck <cornelia.huck at de.ibm.com> Cc: Amit Shah <amit.shah at redhat.com> --- mm/page_alloc.c | 6 ++++++...

Save the free page info into a page bitmap, will be used in virtio balloon device driver. Signed-off-by: Liang Li <liang.z.li at intel.com> Cc: Andrew Morton <akpm at linux-foundation.org> Cc: Vlastimil Babka <vbabka at suse.cz> Cc: Mel Gorman <mgorman at techsingularity.net> Cc: Michael S. Tsirkin <mst at redhat.com> Cc: Paolo Bonzini <pbonzini at redhat.com> Cc: Cornelia Huck <cornelia.huck at de.ibm.com> Cc: Amit Shah <amit.shah at redhat.com> --- mm/page_alloc.c | 46 ++++++...

...6 at 09:23:32AM +0800, Liang Li wrote: > Expose the function to get the max pfn, so it can be used in the > virtio-balloon device driver. > > Signed-off-by: Liang Li <liang.z.li at intel.com> > Cc: Andrew Morton <akpm at linux-foundation.org> > Cc: Vlastimil Babka <vbabka at suse.cz> > Cc: Mel Gorman <mgorman at techsingularity.net> > Cc: Michael S. Tsirkin <mst at redhat.com> > Cc: Paolo Bonzini <pbonzini at redhat.com> > Cc: Cornelia Huck <cornelia.huck at de.ibm.com> > Cc: Amit Shah <amit.shah at redhat.com> > --...

.... virtio-mem will only try to allocate on ZONE_NORMAL, never on ZONE_MOVABLE, just like when allocating gigantic pages (we don't put unmovable data into the movable zone). Cc: Andrew Morton <akpm at linux-foundation.org> Cc: Michal Hocko <mhocko at suse.com> Cc: Vlastimil Babka <vbabka at suse.cz> Cc: Oscar Salvador <osalvador at suse.de> Cc: Mel Gorman <mgorman at techsingularity.net> Cc: Mike Rapoport <rppt at linux.ibm.com> Cc: Dan Williams <dan.j.williams at intel.com> Cc: Alexander Duyck <alexander.h.duyck at linux.intel.com> Cc: Pavel Tatash...

...es*(). However, the four cases do not cover all the situations. For example, drivers/vhost/vhost.c has a "pin, write to page, set page dirty, unpin" case. Add a fifth case, to help explain that there is a general pattern that requires pin_user_pages*() API calls. Cc: Vlastimil Babka <vbabka at suse.cz> Cc: Jan Kara <jack at suse.cz> Cc: J?r?me Glisse <jglisse at redhat.com> Cc: Dave Chinner <david at fromorbit.com> Cc: Jonathan Corbet <corbet at lwn.net> Cc: linux-doc at vger.kernel.org Cc: linux-fsdevel at vger.kernel.org Signed-off-by: John Hubbard <jhu...

...es*(). However, the four cases do not cover all the situations. For example, drivers/vhost/vhost.c has a "pin, write to page, set page dirty, unpin" case. Add a fifth case, to help explain that there is a general pattern that requires pin_user_pages*() API calls. Cc: Vlastimil Babka <vbabka at suse.cz> Cc: Jan Kara <jack at suse.cz> Cc: J?r?me Glisse <jglisse at redhat.com> Cc: Dave Chinner <david at fromorbit.com> Cc: Jonathan Corbet <corbet at lwn.net> Cc: linux-doc at vger.kernel.org Cc: linux-fsdevel at vger.kernel.org Signed-off-by: John Hubbard <jhu...

...6 at 09:23:32AM +0800, Liang Li wrote: > Expose the function to get the max pfn, so it can be used in the > virtio-balloon device driver. > > Signed-off-by: Liang Li <liang.z.li at intel.com> > Cc: Andrew Morton <akpm at linux-foundation.org> > Cc: Vlastimil Babka <vbabka at suse.cz> > Cc: Mel Gorman <mgorman at techsingularity.net> > Cc: Michael S. Tsirkin <mst at redhat.com> > Cc: Paolo Bonzini <pbonzini at redhat.com> > Cc: Cornelia Huck <cornelia.huck at de.ibm.com> > Cc: Amit Shah <amit.shah at redhat.com> > --...

.... virtio-mem will only try to allocate on ZONE_NORMAL, never on ZONE_MOVABLE, just like when allocating gigantic pages (we don't put unmovable data into the movable zone). Cc: Andrew Morton <akpm at linux-foundation.org> Cc: Michal Hocko <mhocko at suse.com> Cc: Vlastimil Babka <vbabka at suse.cz> Cc: Oscar Salvador <osalvador at suse.de> Cc: Mel Gorman <mgorman at techsingularity.net> Cc: Mike Rapoport <rppt at linux.ibm.com> Cc: Dan Williams <dan.j.williams at intel.com> Cc: Alexander Duyck <alexander.h.duyck at linux.intel.com> Cc: Pavel Tatash...