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Date:      Fri, 13 May 2022 13:22:43 +0200 (CEST)
From:      Wojciech Puchar <wojtek@puchar.net>
To:        Michael Wayne <freebsd07@wayne47.com>
Cc:        freebsd-hackers@freebsd.org
Subject:   Re: Can not build kernel on 1GB VM
Message-ID:  <4aa57797-bc29-9cf7-8730-6d93d430f03c@puchar.net>
In-Reply-To: <20220509170925.GQ72471@post.wayne47.com>
References:  <20220415174953.GE13678@post.wayne47.com> <5db061cf-1e23-7cfb-fea-4573f379ae5d@puchar.net> <20220509170925.GQ72471@post.wayne47.com>

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> On Tue, Apr 19, 2022 at 08:52:00AM +0200, Wojciech Puchar wrote:
>> try
>>
>> sysctl -w vm.overcommit=1
>
> No improvement.


So it's not because memory is overallocated by program.


>
>
>> On Fri, 15 Apr 2022, Michael Wayne wrote:
>>> the machine ran out of swap. with a bunch of messages like:
>>>   Apr 15 12:11:26 g1 kernel: swap_pager: indefinite wait buffer: bufobj: 0, blkno: 240593, size: 4096
>>>   Apr 15 12:11:35 g1 kernel: swap_pager: indefinite wait buffer: bufobj: 0, blkno: 236224, size: 16384
>>>   Apr 15 12:11:37 g1 kernel: swap_pager: indefinite wait buffer: bufobj: 0, blkno: 245, size: 12288
>>>   Apr 15 12:11:46 g1 kernel: swap_pager: indefinite wait buffer: bufobj: 0, blkno: 240593, size: 4096
>>>   Apr 15 12:11:55 g1 kernel: swap_pager: indefinite wait buffer: bufobj: 0, blkno: 236224, size: 16384
>>>   Apr 15 12:11:57 g1 kernel: swap_pager: indefinite wait buffer: bufobj: 0, blkno: 245, size: 12288

This message is NOT about running out of space! (sorry i didn't notice it 
before).

this is when I/O is stalled too long.




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