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From: Zdenek Kabelac <zkabelac@redhat.com>
To: dm-devel@redhat.com
Subject: Re: mirrored device with thousand of mappingtableentries
Date: Mon, 28 Feb 2011 14:38:46 +0100	[thread overview]
Message-ID: <4D6BA566.1050305@redhat.com> (raw)
In-Reply-To: <E04C10E329E0CD40816C9C17AE53BBD301863A00@kit001.kaminario.local>

Dne 28.2.2011 14:13, Eli Malul napsal(a):
> 
> OK, I will try that and check the implications of that, thanks!!
> 
> But, do you know why having 10,000 extents is causing this overwhelming
> memory usage?
> 

If you really need that many devices - be also sure
you have disabled this kernel config option:

CONFIG_BLK_DEV_INTEGRITY


For some reason it consumes massive amount of memory.
Other than that - you should count with  64KB per device usually.

Zdenek

  parent reply	other threads:[~2011-02-28 13:38 UTC|newest]

Thread overview: 23+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2011-02-28 11:21 mirrored device with thousand of mapping table entries Eli Malul
2011-02-28 11:48 ` Alasdair G Kergon
2011-02-28 11:59   ` mirrored device with thousand of mapping tableentries Eli Malul
2011-02-28 12:11     ` Alasdair G Kergon
2011-02-28 12:17       ` mirrored device with thousand of mappingtableentries Eli Malul
2011-02-28 13:10         ` Alasdair G Kergon
2011-02-28 13:13           ` Eli Malul
2011-02-28 13:29             ` Alasdair G Kergon
2011-02-28 13:42               ` Eli Malul
2011-02-28 16:25               ` Eli Malul
2011-02-28 13:38             ` Zdenek Kabelac [this message]
2011-02-28 15:01               ` Martin K. Petersen
2011-03-06 20:39                 ` Zdenek Kabelac
2011-03-07  2:59                   ` Martin K. Petersen
2011-03-07 14:24                     ` Zdenek Kabelac
2011-03-07 16:09                     ` Mike Snitzer
2011-03-08  6:51                       ` Martin K. Petersen
2011-03-08 17:13                         ` Mike Snitzer
2011-03-10 16:11                           ` Martin K. Petersen
2011-03-11 16:53                             ` [PATCH] block: Require subsystems to explicitly allocate bio_set integrity mempool (was: Re: mirrored device with thousand of mappingtableentries) Mike Snitzer
2011-03-11 17:11                               ` [PATCH] block: Require subsystems to explicitly allocate bio_set integrity mempool Martin K. Petersen
2011-03-07 20:10                     ` mirrored device with thousand of mappingtableentries Mike Snitzer
2011-03-07 20:22                       ` Martin K. Petersen

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