Daniel Jordan 004ed42638 padata: add basic support for multithreaded jobs ... Sometimes the kernel doesn't take full advantage of system memory bandwidth, leading to a single CPU spending excessive time in initialization paths where the data scales with memory size. Multithreading naturally addresses this problem. Extend padata, a framework that handles many parallel yet singlethreaded jobs, to also handle multithreaded jobs by adding support for splitting up the work evenly, specifying a minimum amount of work that's appropriate for one helper thread to do, load balancing between helpers, and coordinating them. This is inspired by work from Pavel Tatashin and Steve Sistare. Signed-off-by: Daniel Jordan <daniel.m.jordan@oracle.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Tested-by: Josh Triplett <josh@joshtriplett.org> Cc: Alexander Duyck <alexander.h.duyck@linux.intel.com> Cc: Alex Williamson <alex.williamson@redhat.com> Cc: Dan Williams <dan.j.williams@intel.com> Cc: Dave Hansen <dave.hansen@linux.intel.com> Cc: David Hildenbrand <david@redhat.com> Cc: Herbert Xu <herbert@gondor.apana.org.au> Cc: Jason Gunthorpe <jgg@ziepe.ca> Cc: Jonathan Corbet <corbet@lwn.net> Cc: Kirill Tkhai <ktkhai@virtuozzo.com> Cc: Michal Hocko <mhocko@kernel.org> Cc: Pavel Machek <pavel@ucw.cz> Cc: Pavel Tatashin <pasha.tatashin@soleen.com> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Randy Dunlap <rdunlap@infradead.org> Cc: Robert Elliott <elliott@hpe.com> Cc: Shile Zhang <shile.zhang@linux.alibaba.com> Cc: Steffen Klassert <steffen.klassert@secunet.com> Cc: Steven Sistare <steven.sistare@oracle.com> Cc: Tejun Heo <tj@kernel.org> Cc: Zi Yan <ziy@nvidia.com> Link: http://lkml.kernel.org/r/20200527173608.2885243-5-daniel.m.jordan@oracle.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	padata: add basic support for multithreaded jobs	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