Wei Fu 67b54c6670 Support >= 128 layers in overlayfs snapshots ...

Auto-detect longest common dir in lowerdir option and compact it if the
option size is hitting one page size. If does, Use chdir + CLONE to do
mount thing to avoid hitting one page argument buffer in linux kernel
mount.

Signed-off-by: Wei Fu <fhfuwei@163.com>

2018-08-07 10:59:36 +08:00

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