| Message ID | 20181119101616.8901-7-david@redhat.com (mailing list archive) |
|---|---|
| State | New, archived |
| Headers | show |
| Series | mm/kdump: allow to exclude pages that are logically offline | expand |
Thanks for this patch! > On Nov 19, 2018, at 2:16 AM, David Hildenbrand <david@redhat.com> wrote: > > Mark inflated and never onlined pages PG_offline, to tell the world that > the content is stale and should not be dumped. > > Cc: Xavier Deguillard <xdeguillard@vmware.com> > Cc: Nadav Amit <namit@vmware.com> > Cc: Arnd Bergmann <arnd@arndb.de> > Cc: Greg Kroah-Hartman <gregkh@linuxfoundation.org> > Cc: Julien Freche <jfreche@vmware.com> > Cc: Andrew Morton <akpm@linux-foundation.org> > Cc: Matthew Wilcox <willy@infradead.org> > Cc: Michal Hocko <mhocko@suse.com> > Cc: "Michael S. Tsirkin" <mst@redhat.com> > Signed-off-by: David Hildenbrand <david@redhat.com> > --- > drivers/misc/vmw_balloon.c | 32 ++++++++++++++++++++++++++++++++ > 1 file changed, 32 insertions(+) > > diff --git a/drivers/misc/vmw_balloon.c b/drivers/misc/vmw_balloon.c > index e6126a4b95d3..8cc8bd9a4e32 100644 > --- a/drivers/misc/vmw_balloon.c > +++ b/drivers/misc/vmw_balloon.c > @@ -544,6 +544,36 @@ unsigned int vmballoon_page_order(enum vmballoon_page_size_type page_size) > return page_size == VMW_BALLOON_2M_PAGE ? VMW_BALLOON_2M_ORDER : 0; > } > > +/** > + * vmballoon_mark_page_offline() - mark a page as offline > + * @page: pointer for the page If possible, please add a period at the end of the sentence (yes, I know I got it wrong in some places too). > + * @page_size: the size of the page. > + */ > +static void > +vmballoon_mark_page_offline(struct page *page, > + enum vmballoon_page_size_type page_size) > +{ > + int i; > + > + for (i = 0; i < 1ULL << vmballoon_page_order(page_size); i++) Can you please do instead: unsigned int; for (i = 0; i < vmballoon_page_in_frames(page_size); i++) > + __SetPageOffline(page + i); > +} > + > +/** > + * vmballoon_mark_page_online() - mark a page as online > + * @page: pointer for the page > + * @page_size: the size of the page. > + */ > +static void > +vmballoon_mark_page_online(struct page *page, > + enum vmballoon_page_size_type page_size) > +{ > + int i; > + > + for (i = 0; i < 1ULL << vmballoon_page_order(page_size); i++) > + __ClearPageOffline(page + i); Same here (use vmballoon_page_in_frames). > +} > + > /** > * vmballoon_page_in_frames() - returns the number of frames in a page. > * @page_size: the size of the page. > @@ -612,6 +642,7 @@ static int vmballoon_alloc_page_list(struct vmballoon *b, > ctl->page_size); > > if (page) { > + vmballoon_mark_page_offline(page, ctl->page_size); > /* Success. Add the page to the list and continue. */ > list_add(&page->lru, &ctl->pages); > continue; > @@ -850,6 +881,7 @@ static void vmballoon_release_page_list(struct list_head *page_list, > > list_for_each_entry_safe(page, tmp, page_list, lru) { > list_del(&page->lru); > + vmballoon_mark_page_online(page, page_size); > __free_pages(page, vmballoon_page_order(page_size)); > } We would like to test it in the next few days, but in the meanwhile, after you address these minor issues: Acked-by: Nadav Amit <namit@vmware.com> Thanks again, Nadav
On 21.11.18 04:22, Nadav Amit wrote: > Thanks for this patch! > >> On Nov 19, 2018, at 2:16 AM, David Hildenbrand <david@redhat.com> wrote: >> >> Mark inflated and never onlined pages PG_offline, to tell the world that >> the content is stale and should not be dumped. >> >> Cc: Xavier Deguillard <xdeguillard@vmware.com> >> Cc: Nadav Amit <namit@vmware.com> >> Cc: Arnd Bergmann <arnd@arndb.de> >> Cc: Greg Kroah-Hartman <gregkh@linuxfoundation.org> >> Cc: Julien Freche <jfreche@vmware.com> >> Cc: Andrew Morton <akpm@linux-foundation.org> >> Cc: Matthew Wilcox <willy@infradead.org> >> Cc: Michal Hocko <mhocko@suse.com> >> Cc: "Michael S. Tsirkin" <mst@redhat.com> >> Signed-off-by: David Hildenbrand <david@redhat.com> >> --- >> drivers/misc/vmw_balloon.c | 32 ++++++++++++++++++++++++++++++++ >> 1 file changed, 32 insertions(+) >> >> diff --git a/drivers/misc/vmw_balloon.c b/drivers/misc/vmw_balloon.c >> index e6126a4b95d3..8cc8bd9a4e32 100644 >> --- a/drivers/misc/vmw_balloon.c >> +++ b/drivers/misc/vmw_balloon.c >> @@ -544,6 +544,36 @@ unsigned int vmballoon_page_order(enum vmballoon_page_size_type page_size) >> return page_size == VMW_BALLOON_2M_PAGE ? VMW_BALLOON_2M_ORDER : 0; >> } >> >> +/** >> + * vmballoon_mark_page_offline() - mark a page as offline >> + * @page: pointer for the page > > If possible, please add a period at the end of the sentence (yes, I know I > got it wrong in some places too). Sure :) > >> + * @page_size: the size of the page. >> + */ >> +static void >> +vmballoon_mark_page_offline(struct page *page, >> + enum vmballoon_page_size_type page_size) >> +{ >> + int i; >> + >> + for (i = 0; i < 1ULL << vmballoon_page_order(page_size); i++) > > Can you please do instead: > > unsigned int; > > for (i = 0; i < vmballoon_page_in_frames(page_size); i++) > Will do, will have to move both functions a little bit down in the file (exactly one function). > We would like to test it in the next few days, but in the meanwhile, after > you address these minor issues: > > Acked-by: Nadav Amit <namit@vmware.com> Thanks! > > Thanks again, > Nadav >
diff --git a/drivers/misc/vmw_balloon.c b/drivers/misc/vmw_balloon.c index e6126a4b95d3..8cc8bd9a4e32 100644 --- a/drivers/misc/vmw_balloon.c +++ b/drivers/misc/vmw_balloon.c @@ -544,6 +544,36 @@ unsigned int vmballoon_page_order(enum vmballoon_page_size_type page_size) return page_size == VMW_BALLOON_2M_PAGE ? VMW_BALLOON_2M_ORDER : 0; } +/** + * vmballoon_mark_page_offline() - mark a page as offline + * @page: pointer for the page + * @page_size: the size of the page. + */ +static void +vmballoon_mark_page_offline(struct page *page, + enum vmballoon_page_size_type page_size) +{ + int i; + + for (i = 0; i < 1ULL << vmballoon_page_order(page_size); i++) + __SetPageOffline(page + i); +} + +/** + * vmballoon_mark_page_online() - mark a page as online + * @page: pointer for the page + * @page_size: the size of the page. + */ +static void +vmballoon_mark_page_online(struct page *page, + enum vmballoon_page_size_type page_size) +{ + int i; + + for (i = 0; i < 1ULL << vmballoon_page_order(page_size); i++) + __ClearPageOffline(page + i); +} + /** * vmballoon_page_in_frames() - returns the number of frames in a page. * @page_size: the size of the page. @@ -612,6 +642,7 @@ static int vmballoon_alloc_page_list(struct vmballoon *b, ctl->page_size); if (page) { + vmballoon_mark_page_offline(page, ctl->page_size); /* Success. Add the page to the list and continue. */ list_add(&page->lru, &ctl->pages); continue; @@ -850,6 +881,7 @@ static void vmballoon_release_page_list(struct list_head *page_list, list_for_each_entry_safe(page, tmp, page_list, lru) { list_del(&page->lru); + vmballoon_mark_page_online(page, page_size); __free_pages(page, vmballoon_page_order(page_size)); }
Mark inflated and never onlined pages PG_offline, to tell the world that the content is stale and should not be dumped. Cc: Xavier Deguillard <xdeguillard@vmware.com> Cc: Nadav Amit <namit@vmware.com> Cc: Arnd Bergmann <arnd@arndb.de> Cc: Greg Kroah-Hartman <gregkh@linuxfoundation.org> Cc: Julien Freche <jfreche@vmware.com> Cc: Andrew Morton <akpm@linux-foundation.org> Cc: Matthew Wilcox <willy@infradead.org> Cc: Michal Hocko <mhocko@suse.com> Cc: "Michael S. Tsirkin" <mst@redhat.com> Signed-off-by: David Hildenbrand <david@redhat.com> --- drivers/misc/vmw_balloon.c | 32 ++++++++++++++++++++++++++++++++ 1 file changed, 32 insertions(+)