Pavel Tatashin 3d060856ad mm: initialize deferred pages with interrupts enabled ... Initializing struct pages is a long task and keeping interrupts disabled for the duration of this operation introduces a number of problems. 1. jiffies are not updated for long period of time, and thus incorrect time is reported. See proposed solution and discussion here: lkml/20200311123848.118638-1-shile.zhang@linux.alibaba.com 2. It prevents farther improving deferred page initialization by allowing intra-node multi-threading. We are keeping interrupts disabled to solve a rather theoretical problem that was never observed in real world (See 3a2d7fa8a3). Let's keep interrupts enabled. In case we ever encounter a scenario where an interrupt thread wants to allocate large amount of memory this early in boot we can deal with that by growing zone (see deferred_grow_zone()) by the needed amount before starting deferred_init_memmap() threads. Before: [ 1.232459] node 0 initialised, 12058412 pages in 1ms After: [ 1.632580] node 0 initialised, 12051227 pages in 436ms Fixes: 3a2d7fa8a3 ("mm: disable interrupts while initializing deferred pages") Reported-by: Shile Zhang <shile.zhang@linux.alibaba.com> Signed-off-by: Pavel Tatashin <pasha.tatashin@soleen.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Reviewed-by: Daniel Jordan <daniel.m.jordan@oracle.com> Reviewed-by: David Hildenbrand <david@redhat.com> Acked-by: Michal Hocko <mhocko@suse.com> Acked-by: Vlastimil Babka <vbabka@suse.cz> Cc: Dan Williams <dan.j.williams@intel.com> Cc: James Morris <jmorris@namei.org> Cc: Kirill Tkhai <ktkhai@virtuozzo.com> Cc: Sasha Levin <sashal@kernel.org> Cc: Yiqian Wei <yiwei@redhat.com> Cc: <stable@vger.kernel.org> [4.17+] Link: http://lkml.kernel.org/r/20200403140952.17177-3-pasha.tatashin@soleen.com Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>		2020-06-03 20:09:45 -07:00
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acpi	Merge branches 'acpi-apei', 'acpi-pmic', 'acpi-video' and 'acpi-dptf'	2020-06-01 17:19:43 +02:00
asm-generic	Merge branch 'akpm' (patches from Andrew)	2020-06-02 12:21:36 -07:00
clocksource
crypto
drm	drm pull for 5.8-rc1	2020-06-02 15:04:15 -07:00
dt-bindings
keys
kunit
kvm
linux	mm: initialize deferred pages with interrupts enabled	2020-06-03 20:09:45 -07:00
math-emu
media
misc
net	Merge branch 'uaccess.csum' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs	2020-06-01 16:03:37 -07:00
pcmcia
ras
rdma	RDMA/core: Fix double destruction of uobject	2020-05-27 14:22:57 -03:00
scsi
soc
sound
target
trace	mm/page_alloc: integrate classzone_idx and high_zoneidx	2020-06-03 20:09:44 -07:00
uapi	for-5.8-tag	2020-06-02 19:59:25 -07:00
vdso
video
xen