Date: Mon, 8 Aug 2005 18:54:36 +0000 (UTC) From: "Christian S.J. Peron" <csjp@FreeBSD.org> To: src-committers@FreeBSD.org, cvs-src@FreeBSD.org, cvs-all@FreeBSD.org Subject: cvs commit: src/sys/kern kern_sysctl.c Message-ID: <200508081854.j78IsaOp043271@repoman.freebsd.org>
next in thread | raw e-mail | index | archive | help
csjp 2005-08-08 18:54:35 UTC
FreeBSD src repository
Modified files:
sys/kern kern_sysctl.c
Log:
Check to see if we wired the user-supplied buffers in SYSCTL_OUT, if
the buffer has not been wired and we are holding any non-sleep-able locks,
drop a witness warning. If the buffer has not been wired, it is possible
that the writing of the data can sleep, especially if the page is not in
memory. This can result in a number of different locking issues, including
dead locks.
MFC after: 1 week
Discussed with: rwatson
Reviewed by: jhb
Revision Changes Path
1.166 +6 -1 src/sys/kern/kern_sysctl.c
Want to link to this message? Use this URL: <https://mail-archive.FreeBSD.org/cgi/mid.cgi?200508081854.j78IsaOp043271>