Denys Vlasenko 45734a2351 loop: optionally use ioctl(LOOP_CONFIGURE) to set up loopdevs ...

LOOP_CONFIGURE is added to Linux 5.8

function                                             old     new   delta
NO_LOOP_CONFIGURE (old code):
set_loop                                             784     782      -2
LOOP_CONFIGURE:
set_loop                                             784     653    -131
TRY_LOOP_CONFIGURE:
set_loop                                             784     811     +27

Based on a patch by Xiaoming Ni <nixiaoming@huawei.com>

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>

2022-12-13 15:21:28 +01:00

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