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Date: Sun, 18 May 2008 03:39:42 +0200 From: Patrick McHardy <kaber@...sh.net> To: Andrew Morton <akpm@...ux-foundation.org> CC: netdev@...r.kernel.org, bugme-daemon@...zilla.kernel.org, devzero@....de, Robert Olsson <robert.olsson@....uu.se>, "Denis V. Lunev" <den@...nvz.org> Subject: Re: [Bugme-new] [Bug 10737] New: pktgen procfs problem Andrew Morton wrote: > (switched to email. Please respond via emailed reply-to-all, not via the > bugzilla web interface). > > On Sat, 17 May 2008 13:59:25 -0700 (PDT) bugme-daemon@...zilla.kernel.org wrote: > > >> http://bugzilla.kernel.org/show_bug.cgi?id=10737 >> >> Summary: pktgen procfs problem >> Product: Networking >> Version: 2.5 >> KernelVersion: 2.6.26-rc2 >> Platform: All >> OS/Version: Linux >> Tree: Mainline >> Status: NEW >> Severity: normal >> Priority: P1 >> Component: Other >> AssignedTo: acme@...stprotocols.net >> ReportedBy: devzero@....de >> >> >> Latest working kernel version: n/a >> Earliest failing kernel version: 2.6.26-rc2 >> Distribution: suse 10.1 >> Hardware Environment: p4 + gigabyte i915g MoBo >> Software Environment: >> Problem Description: >> pktgen module ocaasional seems to leak procfs entry >> >> May 18 00:00:34 test kernel: [ 2663.373955] pktgen v2.69: Packet Generator for >> packet performance testing. >> May 18 00:00:34 test kernel: [ 2663.384819] remove_proc_entry: removing >> non-empty directory 'net/pktgen', leaking at least 'kpktgend_1' >> > > ^^ > > Possibly we were always leaking this procfs entry, and newly-added > procfs diagnostics are now detecting it. > I've been looking into the same problem, without much success so far. The problem appears to affect any /proc/net file, but not files outside of /proc/net, so I'm guessing its net-ns related. A testcase found by Ben Greear is opening the file multiple times: # /tmp/open /proc/net/kpktgen_0 => refcnt goes to 1 ^C => refcnt goes to 0 Without ^C and opening the file a second time: # /tmp/open /proc/net/kpktgen_0 => refcnt goes to 2 (sometimes also 11) ^C => refcnt stays at previous value. The refcnt even leaks if the file can't be successfully opened, for example because of lacking permissions. -- To unsubscribe from this list: send the line "unsubscribe netdev" in the body of a message to majordomo@...r.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html
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