On Thu, Feb 19, 2015 at 06:54:33PM +0530, Pratyush Anand wrote: > My root file system is xfs. As soon as I enable event for > xfs_trans_read_buf `echo xfs:xfs_trans_read_buf >> > /sys/kernel/debug/tracing/set_event`, I see a kernel panic. > > A little bit of debugging shows that bp->b_fspriv is NULL many a time > when trace_xfs_trans_read_buf(bp->b_fspriv) is called. > > I do not have any idea about xfs filesystem. So, I am not sure, if it > is expected to have bp->b_fspriv = NULL at this location. > > This patch fixes the issue, until we have a better fix. > > Signed-off-by: Pratyush Anand <panand@xxxxxxxxxx> > --- A fix for this has been posted here: http://oss.sgi.com/archives/xfs/2015-02/msg00101.html Brian > fs/xfs/xfs_trans_buf.c | 3 ++- > 1 file changed, 2 insertions(+), 1 deletion(-) > > diff --git a/fs/xfs/xfs_trans_buf.c b/fs/xfs/xfs_trans_buf.c > index 0a4d4ab6d9a9..0b67a20643bf 100644 > --- a/fs/xfs/xfs_trans_buf.c > +++ b/fs/xfs/xfs_trans_buf.c > @@ -329,7 +329,8 @@ xfs_trans_read_buf_map( > > if (tp) > _xfs_trans_bjoin(tp, bp, 1); > - trace_xfs_trans_read_buf(bp->b_fspriv); > + if (bp->b_fspriv) > + trace_xfs_trans_read_buf(bp->b_fspriv); > *bpp = bp; > return 0; > > -- > 2.1.0 > > _______________________________________________ > xfs mailing list > xfs@xxxxxxxxxxx > http://oss.sgi.com/mailman/listinfo/xfs _______________________________________________ xfs mailing list xfs@xxxxxxxxxxx http://oss.sgi.com/mailman/listinfo/xfs
