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Re: "HISTSIZE=999999999" cause bash failure after lastest upgrade


From: Sean Zha
Subject: Re: "HISTSIZE=999999999" cause bash failure after lastest upgrade
Date: Sat, 8 Oct 2016 11:46:17 +0000

It's fixed, thank you.


Sean


From: Chet Ramey <address@hidden>
Sent: Wednesday, October 5, 2016 9:16 PM
To: Sean Zha; address@hidden; address@hidden
Cc: address@hidden
Subject: Re: "HISTSIZE=999999999" cause bash failure after lastest upgrade
 
On 9/25/16 6:59 PM, Chet Ramey wrote:
> On 9/25/16 3:51 PM, Sean Zha wrote:
>
>> Bash Version: 4.4
>> Patch Level: 0
>> Release Status: release
>>
>> Description:
>>       I use a huge value for HISTSIZE (=999999999) to enable infinite
>>       history items. The actural size of ~/.bash_history is only 4MB now.
>>       Everything worked fine before the lastest upgrade. Now bash refuse
>>       me to login due to memory allocation failure. After choosing
>>       a smaller HISTSIZE, bash still eatup too much unnesssary memory.
>>
>> Repeat-By:
>>       open a workable terminal with small HISTSIZE setting,
>>       $ echo HISTSIZE=999999999 > ~/test.rc
>>       $ bash --rcfile ~/test.rc
>>         bash: xmalloc: cannot allocate 8000000008 bytes (114688 bytes allocated)
>
> Since you've specified the desired history size, bash tries to allocate
> enough entries to hold all of the entries.  The assumption is that this
> will reduce the number of allocations/reallocations and the number of
> times the history list has to be copied as it's reallocated.  I suppose
> I should cap the maximum value for which that occurs instead of trusting
> the supplied max number of entries.

Try the attached patch and see whether or not it improves things.

Chet
--
``The lyf so short, the craft so long to lerne.'' - Chaucer
                 ``Ars longa, vita brevis'' - Hippocrates
Chet Ramey, UTech, CWRU    address@hidden    http://cnswww.cns.cwru.edu/~chet/

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