android_kernel_xiaomi_sm8350/fs/proc
Hugh Dickins deceb6cd17 [PATCH] mm: follow_page with inner ptlock
Final step in pushing down common core's page_table_lock.  follow_page no
longer wants caller to hold page_table_lock, uses pte_offset_map_lock itself;
and so no page_table_lock is taken in get_user_pages itself.

But get_user_pages (and get_futex_key) do then need follow_page to pin the
page for them: take Daniel's suggestion of bitflags to follow_page.

Need one for WRITE, another for TOUCH (it was the accessed flag before:
vanished along with check_user_page_readable, but surely get_numa_maps is
wrong to mark every page it finds as accessed), another for GET.

And another, ANON to dispose of untouched_anonymous_page: it seems silly for
that to descend a second time, let follow_page observe if there was no page
table and return ZERO_PAGE if so.  Fix minor bug in that: check VM_LOCKED -
make_pages_present ought to make readonly anonymous present.

Give get_numa_maps a cond_resched while we're there.

Signed-off-by: Hugh Dickins <hugh@veritas.com>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
2005-10-29 21:40:41 -07:00
..
array.c [PATCH] mm: rss = file_rss + anon_rss 2005-10-29 21:40:38 -07:00
base.c [PATCH] nommu build error fix 2005-10-14 17:10:13 -07:00
generic.c [PATCH] proc: link count fix 2005-09-07 16:57:28 -07:00
inode-alloc.txt Linux-2.6.12-rc2 2005-04-16 15:20:36 -07:00
inode.c [PATCH] update filesystems for new delete_inode behavior 2005-09-09 13:57:27 -07:00
internal.h Linux-2.6.12-rc2 2005-04-16 15:20:36 -07:00
kcore.c Linux-2.6.12-rc2 2005-04-16 15:20:36 -07:00
kmsg.c Linux-2.6.12-rc2 2005-04-16 15:20:36 -07:00
Makefile [PATCH] kdump: Access dump file in elf format (/proc/vmcore) 2005-06-25 16:24:53 -07:00
mmu.c [PATCH] fix impossible VmallocChunk 2005-05-17 07:59:10 -07:00
nommu.c [PATCH] output of /proc/maps on nommu systems is incomplete 2005-10-17 17:03:57 -07:00
proc_devtree.c [PATCH] ppc32/ppc64: cleanup /proc/device-tree 2005-06-01 07:54:14 -07:00
proc_misc.c [PATCH] kdump: Access dump file in elf format (/proc/vmcore) 2005-06-25 16:24:53 -07:00
proc_tty.c Linux-2.6.12-rc2 2005-04-16 15:20:36 -07:00
root.c Linux-2.6.12-rc2 2005-04-16 15:20:36 -07:00
task_mmu.c [PATCH] mm: follow_page with inner ptlock 2005-10-29 21:40:41 -07:00
task_nommu.c Linux-2.6.12-rc2 2005-04-16 15:20:36 -07:00
vmcore.c [PATCH] kdump: Parse elf32 headers and export through /proc/vmcore 2005-06-25 16:24:53 -07:00