[Dovecot] "Out of memory" error in 1.0alpha3

[Sergey A. Lipnevich]

Timo,

I'll try to reproduce the error on a different AMD64 machine (it won't 
have multiple CPUs though). The one I was talking about is in production.
BTW, the compiler was GCC 4.0.2.
Dovecot is great. Thanks a lot!

Sergey.

Timo Sirainen wrote:

>On Fri, 2005-10-14 at 00:47 -0400, Sergey A. Lipnevich wrote:
>  
>
>>Hi All,
>>
>>I have Dovecot 1.0 Alpha3 running on x86_64 Linux 2.6 multi-CPU box 
>>using Maildir folders. Moving messages from one folder to another in 
>>Thunderbird 1.0.7, regardless of their size (usually small), produced 
>>error 83, "Out of memory", when both of these parameters were unset 
>>(default): mail_read_mmaped, mmap_disable. The log line before the error 
>>was pool_system_malloc(): Out of memory.
>>    
>>
>
>This is a bug in Dovecot. It looks like it happens only with 64bit
>systems. Would you mind getting a gdb backtrace from that, it would help
>in fixing it? Works basically like:
>
> - Open the mailbox in thunderbird
> - gdb attach pid-of-the-imap-process-that's-going-to-move-the-messages
> - Give "cont" command
> - Move the messages and wait for crash
> - Give "bt" command
> - mail the reply to me
>
>  
>
>>I initially changed mmap_disable to "yes", the error stopped, but it 
>>still wasn't moving messages reliably. I then set MM parameters more 
>>aggressively: mail_read_mmaped = yes, mmap_disable = no (and the third 
>>of the series, mmap_no_write, is left unset). The error stopped popping 
>>up, and the moving works speedily.
>>Maybe the default for mail_read_mmaped should be "yes?"
>>    
>>
>
>That probably just goes around the buggy code path..
>
>  
>