On Tue, Mar 21, 2017 at 01:07:42PM -0700, Cy Schubert wrote: > In message <20170321195202.gf86...@zxy.spb.ru>, Slawa Olhovchenkov writes: > > On Tue, Mar 21, 2017 at 11:50:04AM -0700, Gleb Smirnoff wrote: > > > > > John, > > > > > > On Tue, Mar 21, 2017 at 10:40:34AM -0700, John Baldwin wrote: > > > J> First, this is a very good change and long overdue in divorcing the > > > J> user-facing structure for live system reporting vs the kernel > > > structure. > > > J> > > > J> However, I realize you don't use info from netstat when debugging > > > kernel > > > J> crash dumps, but other people _do_. It's ok if the kvm bits of netstat > > > J> require a matching kernel and thus require recompiling everytime the > > > ABI > > > J> changes, but it is useful to have them. Please restore those. > > > > > > I have very much anticipated this comment from you, John. > > > > > > I would like to remind you, that we have had this very exact conversation > > > back when I removed kvm support from netstat/route.c. Let me search the > > > archives: > > > > > > https://lists.freebsd.org/pipermail/svn-src-head/2015-April/070480.html > > > > > > This conversation has had a continuation on IRC, which I don't archive. > > > > > > AFAIR, first I told that with all my involvement into networking stack, > > > I never ever had experienced a need to run route stats on a core. The > > > debugger were the only useful tool. And that opinion was seconded by > > > other network hackers. Then we discussed that a proper tool chould use > > > dynamic type parsing and not kvm(3). You said that future gdb has python > > > scripting and that would work fine. Meanwhile, you insisted that I restore > > > the functionality. I resisted to put kvm(3) back into netstat/route.c, and > > > instead I created a gdb script that prints exactly what 'nestat -anr -M > > > cor > > e' > > > prints. And I committed the script just to satisfy your demand: > > > > > > tools/debugscripts/netstat-anr.gdb > > > > > > Can you please fairly answer, have you (or anyone else) ever used the > > > script during these 2 years? > > > > > > I believe, the inpcb/tcpcb printing from a core functionality has the > > > same level of real usefulness. I could create the same script for pcbs, > > > and I am afraid it is going to share fate of netstat-anr.gdb. > > > > How long run this script for core file w/ 40K TCP connections? > > Would it be possible to replace this script with new DTrace probes and a > DTrace script?
DTrace probes in /etc/rc.d/savecore? Realy? _______________________________________________ svn-src-head@freebsd.org mailing list https://lists.freebsd.org/mailman/listinfo/svn-src-head To unsubscribe, send any mail to "svn-src-head-unsubscr...@freebsd.org"
