linux

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Mel Gorman 0e1cc95b4c mm: meminit: finish initialisation of struct pages before basic setup

Waiman Long reported that 24TB machines hit OOM during basic setup when
struct page initialisation was deferred.  One approach is to initialise
memory on demand but it interferes with page allocator paths.  This patch
creates dedicated threads to initialise memory before basic setup.  It
then blocks on a rw_semaphore until completion as a wait_queue and counter
is overkill.  This may be slower to boot but it's simplier overall and
also gets rid of a section mangling which existed so kswapd could do the
initialisation.

[akpm@linux-foundation.org: include rwsem.h, use DECLARE_RWSEM, fix comment, remove unneeded cast]
Signed-off-by: Mel Gorman <mgorman@suse.de>
Cc: Waiman Long <waiman.long@hp.com
Cc: Nathan Zimmer <nzimmer@sgi.com>
Cc: Dave Hansen <dave.hansen@intel.com>
Cc: Scott Norton <scott.norton@hp.com>
Tested-by: Daniel J Blueman <daniel@numascale.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

2015-06-30 19:44:56 -07:00

calibrate.c

kernel: add calibration_delay_done()

2014-06-16 12:47:39 -06:00

do_mounts_initrd.c

usermodehelper: split remaining calls to call_usermodehelper_fns()

2013-04-30 17:04:06 -07:00

do_mounts_md.c

init: disable sparse checking of the mount.o source files

2012-05-31 17:49:27 -07:00

do_mounts_rd.c

initramfs: support initramfs that is bigger than 2GiB