K 10
svn:author
V 7
rscheff
K 8
svn:date
V 27
2021-04-16T19:37:40.341600Z
K 7
svn:log
V 555
Export sbuf_drain to orchestrate lock and drain action

While exporting large amounts of data to a sysctl
request, datastructures may need to be locked.

Exporting the sbuf_drain function allows the
coordination between drain events and held
locks, to avoid stalls.

PR:		254333
Reviewed By:	jhb
MFC after:	2 weeks
Sponsored by:	NetApp, Inc.
Differential Revision: https://reviews.freebsd.org/D29481

(cherry picked from commit c804c8f2c58ba42d476de07fbceff9ac4dd95f0e)

Git Hash:   dc5281a7d43917c55905d8b83a5bef69b8013071
Git Author: rscheff@FreeBSD.org
END