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MIGRATE_PFN_LOCKED is used to indicate to migrate_vma_prepare() that a source page was already locked during migrate_vma_collect(). If it wasn't then the a second attempt is made to lock the page. However if the first attempt failed it's unlikely a second attempt will succeed, and the retry adds complexity. So clean this up by removing the retry and MIGRATE_PFN_LOCKED flag. Destination pages are also meant to have the MIGRATE_PFN_LOCKED flag set, but nothing actually checks that. Link: https://lkml.kernel.org/r/20211025041608.289017-1-apopple@nvidia.com Signed-off-by: Alistair Popple <apopple@nvidia.com> Reviewed-by: Ralph Campbell <rcampbell@nvidia.com> Acked-by: Felix Kuehling <Felix.Kuehling@amd.com> Cc: Alex Deucher <alexander.deucher@amd.com> Cc: Jerome Glisse <jglisse@redhat.com> Cc: John Hubbard <jhubbard@nvidia.com> Cc: Zi Yan <ziy@nvidia.com> Cc: Christoph Hellwig <hch@lst.de> Cc: Ben Skeggs <bskeggs@redhat.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org> |
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ABI | ||
accounting | ||
admin-guide | ||
arm | ||
arm64 | ||
block | ||
bpf | ||
cdrom | ||
core-api | ||
cpu-freq | ||
crypto | ||
dev-tools | ||
devicetree | ||
doc-guide | ||
driver-api | ||
fault-injection | ||
fb | ||
features | ||
filesystems | ||
firmware-guide | ||
firmware_class | ||
fpga | ||
gpu | ||
hid | ||
hwmon | ||
i2c | ||
ia64 | ||
ide | ||
iio | ||
infiniband | ||
input | ||
isdn | ||
kbuild | ||
kernel-hacking | ||
leds | ||
litmus-tests | ||
livepatch | ||
locking | ||
m68k | ||
maintainer | ||
mhi | ||
mips | ||
misc-devices | ||
netlabel | ||
networking | ||
nios2 | ||
nvdimm | ||
openrisc | ||
parisc | ||
PCI | ||
pcmcia | ||
power | ||
powerpc | ||
process | ||
RCU | ||
riscv | ||
s390 | ||
scheduler | ||
scsi | ||
security | ||
sh | ||
sound | ||
sparc | ||
sphinx | ||
sphinx-static | ||
spi | ||
staging | ||
target | ||
timers | ||
trace | ||
translations | ||
usb | ||
userspace-api | ||
virt | ||
vm | ||
w1 | ||
watchdog | ||
x86 | ||
xtensa | ||
.gitignore | ||
arch.rst | ||
asm-annotations.rst | ||
atomic_bitops.txt | ||
atomic_t.txt | ||
Changes | ||
CodingStyle | ||
conf.py | ||
COPYING-logo | ||
docutils.conf | ||
dontdiff | ||
index.rst | ||
Kconfig | ||
logo.gif | ||
Makefile | ||
memory-barriers.txt | ||
SubmittingPatches | ||
watch_queue.rst |