Konstantin Belousov 5cf14660ae Improve publication of the newly allocated snapdata. ...

For freshly allocated snapdata, Lock sn_lock in advance, so
si_snapdata readers see the locked snapdata and not race.

For existing snapdata, if the thread was put to sleep waiting for
sn_lock, re-read si_snapdata.  This either closes the race or makes
the reliance on LK_DRAIN less important.

Reported and tested by:	pho
Sponsored by:	The FreeBSD Foundation
MFC after:	2 weeks

2017-07-21 18:42:35 +00:00

..

ffs

Improve publication of the newly allocated snapdata.

2017-07-21 18:42:35 +00:00

ufs

Consistently use vop_stdpathconf() for default pathconf values.

2017-07-11 21:55:20 +00:00