svn commit: r212465 -
head/sys/cddl/contrib/opensolaris/uts/common/dtrace
Kostik Belousov
kostikbel at gmail.com
Sat Sep 11 13:23:18 UTC 2010
On Sat, Sep 11, 2010 at 12:58:31PM +0000, Rui Paulo wrote:
> Author: rpaulo
> Date: Sat Sep 11 12:58:31 2010
> New Revision: 212465
> URL: http://svn.freebsd.org/changeset/base/212465
>
> Log:
> Avoid a LOR (sleepable after non-sleepable) in
> fasttrap_tracepoint_enable().
>
> Sponsored by: The FreeBSD Foundation
>
> Modified:
> head/sys/cddl/contrib/opensolaris/uts/common/dtrace/fasttrap.c
>
> Modified: head/sys/cddl/contrib/opensolaris/uts/common/dtrace/fasttrap.c
> ==============================================================================
> --- head/sys/cddl/contrib/opensolaris/uts/common/dtrace/fasttrap.c Sat Sep 11 12:51:01 2010 (r212464)
> +++ head/sys/cddl/contrib/opensolaris/uts/common/dtrace/fasttrap.c Sat Sep 11 12:58:31 2010 (r212465)
> @@ -591,7 +591,9 @@ fasttrap_tracepoint_enable(proc_t *p, fa
> * Before we make any modifications, make sure we've imposed a barrier
> * on the generation in which this probe was last modified.
> */
> + PROC_UNLOCK(p);
> fasttrap_mod_barrier(probe->ftp_gen);
> + PROC_LOCK(p);
>
> bucket = &fasttrap_tpoints.fth_table[FASTTRAP_TPOINTS_INDEX(pid, pc)];
>
I suspect that you should hold the process around unlocked region.
fasttrap_pid_enable() also does unlock, so it might be better to hold
the process immediately after pfind().
-------------- next part --------------
A non-text attachment was scrubbed...
Name: not available
Type: application/pgp-signature
Size: 196 bytes
Desc: not available
Url : http://lists.freebsd.org/pipermail/svn-src-head/attachments/20100911/10b2cccc/attachment.pgp
More information about the svn-src-head
mailing list