Re: 2.6.23-rc7-mm1

From: Reuben Farrelly
Date: Mon Sep 24 2007 - 11:02:20 EST

On 24/09/2007 7:17 PM, Andrew Morton wrote:

- New git tree git-powerpc-galak.patch added to the -mm lineup: ppc32
things, mainly (Kumar Gala <galak@xxxxxxxxxxxxxxxxx>)

I'm observing a problem with this kernel (as well as 2.6.23-rc6-mm1) which manifests itself only in my Postfix/application mail.logs:

Sep 25 00:25:40 tornado postfix/smtp[12520]: fatal: select lock: Cannot allocate memory
Sep 25 00:25:41 tornado postfix/master[8002]: warning: process /usr/lib64/postfix/smtp pid 12520 exit status 1

This is happening frequently with processes started via 'master' (smtp, smtpd and cleanup), but it does not appear to have any noticeable operational impact apart from logging a lot of copies of this message.

The corresponding code in Postfix which triggers this is (choice of 3 files in src/master are all possibilities which all have much the same code)

* The event loop, at last.
while (var_use_limit == 0 || use_count < var_use_limit || client_count > 0) {
if (multi_server_lock != 0) {
if (myflock(vstream_fileno(multi_server_lock), INTERNAL_LOCK,
msg_fatal("select lock: %m");
delay = loop ? loop(multi_server_name, multi_server_argv) : -1;

Now I'm not convinced this is an application problem, because I'm only seeing this after running up kernel 2.6.23-rc6-mm1 or 2.6.23-rc7-mm1 and with NO changes to the application itself. Using the same application binaries it does not occur with 2.6.22 mainline. [I didn't get a lot of testing with the -mm release prior to that unfortunately due to some other breakage.]

Is there anything new in the last two or so -mm kernels which could have caused this?

I've put my .config up at

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