Date: Thu, 20 Apr 2017 09:31:40 +0000 From: Tom Vijlbrief <tvijlbrief@gmail.com> To: Mark Millard <markmi@dsl-only.net>, ronald-lists@klop.ws Cc: FreeBSD Current <freebsd-current@freebsd.org>, freebsd-arm <freebsd-arm@freebsd.org>, sobomax@freebsd.org Subject: Re: Sendmail eats CPU on r317039 [after -r316874 it may be -r316951 and -r316973 are not enough to fix everything] Message-ID: <CAOQrpVf1_35UZTe19JQ3hUKgGVPkcy1uaEmz%2BgTeeFK9jCbpSA@mail.gmail.com> In-Reply-To: <CAOQrpVeFFuFxwPjR93Uw7BkmmXu=u=E_2T0gNfd8ZidNW173VA@mail.gmail.com> References: <CAOQrpVcMaJMdumOKGkUxMHPD-rGWQHbaLm3EsWagJp2wt_8KWg@mail.gmail.com> <91A4570B-69EE-4462-9C60-205C66267599@dsl-only.net> <7AD329E1-2828-42EB-9A14-B44E357CC199@dsl-only.net> <CAOQrpVeFFuFxwPjR93Uw7BkmmXu=u=E_2T0gNfd8ZidNW173VA@mail.gmail.com>
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Op wo 19 apr. 2017 09:11 schreef Tom Vijlbrief <tvijlbrief@gmail.com>:
> I'm currently rebuilding world and kernel on a just completed SVN checkout.
>
> Note that the normal sendmail daemon which listens for incoming traffic
> does NOT loop.
>
> The sendmail instance which tries local delivery (echo Hi | mail root) or
> the msp_queue instance is looping.
>
> It might be an arm64 specific issue, but a few weeks ago this was not an
> issue.
>
I just completed a full rebuild on the Pine64 and I cannot reproduce the
problem, so there is probably no issue anymore...
(Except the spurious interrupts issue)
> Op di 18 apr. 2017 om 21:15 schreef Mark Millard <markmi@dsl-only.net>:
>
>> Ronald Klop ronald-lists at klop.ws wrote on Tue Apr 18 09:59:50 UTC
>> 2017:
>>
>> > there is a thread ono this list about a problem in syslogd which made
>> > syslog-clients (like sendmail busy-looping on logging.
>> > That might be related to this. (it is fixed in the source already, so
>> > upgrading again might help)
>> > See the thread with subject like 'Re: r316958: booting a server takes
>> >10
>> > minutes!'
>> >
>> > Regards,
>> >
>> > Ronald.
>>
>>
>> Yes. But Tom V.'s report is for -r317039, which is after the reported
>> fixes as far as I can tell. Something besides syslogd might also cause
>> problems?
>>
>> In my nearly-default -r317015 ardm64 context [as a VirtualBox guest]
>> I've not seen the problem, where I did before. (The only reason sendmail
>> runs in my context is for the messages FreeBSD sends to it own local
>> accounts. I do not otherwise use mail in this context.)
>>
>> Tom V.'s report vs. others finding lack of a problem suggests that the
>> coverage of the fixes is incomplete somehow but useful. I happen to not
>> be doing whatever causes the problem to appear. I've no clue what might
>> be different or unusual in Tom V.'s context.
>>
>> There is also the possibility that Tom V.'s report is a fully independent
>> issue. But such does not seem all that likely on the initial information.
>>
>>
>> > On 2017-Apr-17, at 7:57 AM, Mark Millard <markmi at dsl-only.net>
>> wrote:
>> >
>> >> Just an FYI of a more recent report of runaway sendmail on a
>> >> more recent system version ( -r317039 ):
>> >>
>> >> Begin forwarded message:
>> >>
>> >>> From: Tom Vijlbrief <tvijlbrief at gmail.com>
>> >>> Subject: Sendmail eats CPU on r317039
>> >>> Date: April 17, 2017 at 3:39:37 AM PDT
>> >>> To: "freebsd-current at freebsd.org" <freebsd-current at freebsd.org>,
>> freebsd-arm <freebsd-arm at freebsd.org>
>> >>>
>> >>> On a recent kernel sendmail is constantly consuming CPU.
>> >>>
>> >>> truss -p PID
>> >>>
>> >>> shows:
>> >>>
>> >>> sendto(3,"<22>Apr 17 10:30:33 sendmail[362"...,163,0x0,NULL,0) ERR#55
>> 'No
>> >>> buffer space available'
>> >>> nanosleep({ 0.000001000 }) = 0 (0x0)
>> >>> sendto(3,"<22>Apr 17 10:30:33 sendmail[362"...,163,0x0,NULL,0) ERR#55
>> 'No
>> >>> buffer space available'
>> >>> nanosleep({ 0.000001000 })
>> >>> ...
>> >>>
>> >>> This is on an arm64 system
>> >>
>> >> Analysis of Tom V.'s context for this may be required.
>>
>> ===
>> Mark Millard
>> markmi at dsl-only.net
>>
>> _______________________________________________
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>> https://lists.freebsd.org/mailman/listinfo/freebsd-arm
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>>
>
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