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RE: High latencies writing to a memory mapped file

To: <xfs@xxxxxxxxxxx>
Subject: RE: High latencies writing to a memory mapped file
From: "Kinzel, David" <David.Kinzel@xxxxxxxxxx>
Date: Tue, 27 Jul 2010 13:59:28 -0600
In-reply-to: <20100727144914.GA29349@xxxxxxx>
References: <20100722144706.GA2840@xxxxxxxxxxxxxxxxxxxxxxxxx><20100727092452.GA23307@xxxxxxx><4C4EDEFD.7000401@xxxxxxxxxxxxxxxxx> <20100727144914.GA29349@xxxxxxx>
Thread-index: AcstnrCJe0TIW/iqTtCrHOWdMvX0sQAJwz+w
Thread-topic: High latencies writing to a memory mapped file
>> Matthias Schniedermeyer put forth on 7/27/2010 4:24 AM:
>> 
>> > We have a linux-computer with samba to act as a fileserver 
>for a few 
>> > Windows-Clients and ever since kernel 2.6.26 (Never 
>happend with 2.6.25) 
>> > the server randomly "hangs" for a few seconds (Which is more of a 
>> > problem that drives people crazy).
>> 

The server hangs, or the connections to samba do? I've found that samba
is given a ridiculously low IO priority so that any IO on the server
will pretty much cause it to stall -- be it updating locate, a backup
job, etc. 

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