lists.openwall.net | lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC | |
Open Source and information security mailing list archives
| ||
|
Message-ID: <20130408110112.GA8332@thunk.org> Date: Mon, 8 Apr 2013 07:01:12 -0400 From: Theodore Ts'o <tytso@....edu> To: "Frank Ch. Eigler" <fche@...hat.com> Cc: Mel Gorman <mgorman@...e.de>, linux-ext4@...r.kernel.org, LKML <linux-kernel@...r.kernel.org>, Linux-MM <linux-mm@...ck.org>, Jiri Slaby <jslaby@...e.cz> Subject: Re: Excessive stall times on ext4 in 3.9-rc2 On Sun, Apr 07, 2013 at 05:59:06PM -0400, Frank Ch. Eigler wrote: > > semantic error: while resolving probe point: identifier 'kprobe' at /tmp/stapdjN4_l:18:7 > > source: probe kprobe.function("get_request_wait") > > ^ > > Pass 2: analysis failed. [man error::pass2] > > Unexpected exit of STAP script at ./watch-dstate.pl line 296. > > I have no clue what to do next. Can you give me a hint? Is there any reason why the error message couldn't be simplified, to something as "kernel symbol not found"? I wasn't sure if the problem was that there was some incompatibility between a recent change with kprobe and systemtap, or parse failure in the systemtap script, etc. > Systemtap could endavour to list roughly-matching functions that do > exist, if you think that's be helpful. If the goal is ease of use, I suspect the more important thing that systemtap could do is to make its error messages more easily understandable, instead of pointing the user to read a man page where the user then has to figure out which one of a number of failure scenarios were caused by a particularly opaque error message. (The man page doesn't even say that "semantic error while resolving probe point" means that a kernel function doesn't exist -- especially complaining about the kprobe identifier points the user in the wrong direction.) - Ted -- To unsubscribe from this list: send the line "unsubscribe linux-ext4" in the body of a message to majordomo@...r.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html
Powered by blists - more mailing lists