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Note the need for a new kernel / userland for devinfo to work

Differential Revision: https://reviews.freebsd.org/D15628
This commit is contained in:
Warner Losh 2018-05-31 02:58:08 +00:00
parent cf72c10fd2
commit 0bf7cdd502
Notes: svn2git 2020-12-20 02:59:44 +00:00
svn path=/head/; revision=334416

View File

@ -32,6 +32,12 @@ NOTE TO PEOPLE WHO THINK THAT FreeBSD 12.x IS SLOW:
"ln -s 'abort:false,junk:false' /etc/malloc.conf".)
20180530:
The kernel / userland interface for devinfo changed, so you'll
need a new kernel and userland as a pair for it to work (rebuilding
lib/libdevinfo is all that's required). devinfo and devmatch will
not work, but everything else will when there's a mismatch.
20180523:
The on-disk format for hwpmc callchain records has changed to include
threadid corresponding to a given record. This changes the field offsets