diff options
Diffstat (limited to 'target/linux/generic/backport-4.9/040-mm-add-support-for-releasing-multiple-instances-of-a.patch')
| -rw-r--r-- | target/linux/generic/backport-4.9/040-mm-add-support-for-releasing-multiple-instances-of-a.patch | 75 |
1 files changed, 0 insertions, 75 deletions
diff --git a/target/linux/generic/backport-4.9/040-mm-add-support-for-releasing-multiple-instances-of-a.patch b/target/linux/generic/backport-4.9/040-mm-add-support-for-releasing-multiple-instances-of-a.patch deleted file mode 100644 index 4656bb1db3..0000000000 --- a/target/linux/generic/backport-4.9/040-mm-add-support-for-releasing-multiple-instances-of-a.patch +++ /dev/null @@ -1,75 +0,0 @@ -From: Alexander Duyck <alexander.h.duyck@intel.com> -Date: Wed, 14 Dec 2016 15:05:26 -0800 -Subject: [PATCH] mm: add support for releasing multiple instances of a page - -Add a function that allows us to batch free a page that has multiple -references outstanding. Specifically this function can be used to drop -a page being used in the page frag alloc cache. With this drivers can -make use of functionality similar to the page frag alloc cache without -having to do any workarounds for the fact that there is no function that -frees multiple references. - -Link: http://lkml.kernel.org/r/20161110113606.76501.70752.stgit@ahduyck-blue-test.jf.intel.com -Signed-off-by: Alexander Duyck <alexander.h.duyck@intel.com> -Cc: "David S. Miller" <davem@davemloft.net> -Cc: "James E.J. Bottomley" <jejb@parisc-linux.org> -Cc: Chris Metcalf <cmetcalf@mellanox.com> -Cc: David Howells <dhowells@redhat.com> -Cc: Geert Uytterhoeven <geert@linux-m68k.org> -Cc: Hans-Christian Noren Egtvedt <egtvedt@samfundet.no> -Cc: Helge Deller <deller@gmx.de> -Cc: James Hogan <james.hogan@imgtec.com> -Cc: Jeff Kirsher <jeffrey.t.kirsher@intel.com> -Cc: Jonas Bonn <jonas@southpole.se> -Cc: Keguang Zhang <keguang.zhang@gmail.com> -Cc: Ley Foon Tan <lftan@altera.com> -Cc: Mark Salter <msalter@redhat.com> -Cc: Max Filippov <jcmvbkbc@gmail.com> -Cc: Michael Ellerman <mpe@ellerman.id.au> -Cc: Michal Simek <monstr@monstr.eu> -Cc: Ralf Baechle <ralf@linux-mips.org> -Cc: Rich Felker <dalias@libc.org> -Cc: Richard Kuo <rkuo@codeaurora.org> -Cc: Russell King <linux@armlinux.org.uk> -Cc: Steven Miao <realmz6@gmail.com> -Cc: Tobias Klauser <tklauser@distanz.ch> -Cc: Vineet Gupta <vgupta@synopsys.com> -Cc: Yoshinori Sato <ysato@users.sourceforge.jp> -Signed-off-by: Andrew Morton <akpm@linux-foundation.org> -Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org> ---- - ---- a/include/linux/gfp.h -+++ b/include/linux/gfp.h -@@ -529,6 +529,8 @@ extern void free_hot_cold_page(struct pa - extern void free_hot_cold_page_list(struct list_head *list, bool cold); - - struct page_frag_cache; -+extern void __page_frag_drain(struct page *page, unsigned int order, -+ unsigned int count); - extern void *__alloc_page_frag(struct page_frag_cache *nc, - unsigned int fragsz, gfp_t gfp_mask); - extern void __free_page_frag(void *addr); ---- a/mm/page_alloc.c -+++ b/mm/page_alloc.c -@@ -3935,6 +3935,20 @@ static struct page *__page_frag_refill(s - return page; - } - -+void __page_frag_drain(struct page *page, unsigned int order, -+ unsigned int count) -+{ -+ VM_BUG_ON_PAGE(page_ref_count(page) == 0, page); -+ -+ if (page_ref_sub_and_test(page, count)) { -+ if (order == 0) -+ free_hot_cold_page(page, false); -+ else -+ __free_pages_ok(page, order); -+ } -+} -+EXPORT_SYMBOL(__page_frag_drain); -+ - void *__alloc_page_frag(struct page_frag_cache *nc, - unsigned int fragsz, gfp_t gfp_mask) - { |