linux-kernel - Re: [PATCH 03/10] mpt3sas: Reduce memory footprints in kdump kernel

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Message-ID: <c29a8e75-81a4-f0ff-9d47-d59730b873f3@redhat.com>
Date:   Wed, 11 Oct 2017 17:33:37 +0200
From:   Tomas Henzl <thenzl@...hat.com>
To:     Sreekanth Reddy <sreekanth.reddy@...adcom.com>,
        linux-scsi@...r.kernel.org, hch@...radead.org
Cc:     martin.petersen@...cle.com, JBottomley@...allels.com,
        Sathya.Prakash@...adcom.com, linux-kernel@...r.kernel.org
Subject: Re: [PATCH 03/10] mpt3sas: Reduce memory footprints in kdump kernel

On 10/10/2017 03:11 PM, Sreekanth Reddy wrote:
> To reduce the memory footprints of the driver in kdump kernel,
>  we have made below driver setting when system boots in to kdump kernel,
>
> 1. Used single MSI-x vector.
> 2. Disable RDPQ mode.
> 3. Set sg_table_size to 32 by default.
> 4) Set SCSI IO Queue depth to 200.
>
> Signed-off-by: Sreekanth Reddy <Sreekanth.Reddy@...adcom.com>

I think that preferred is (though not much used yet) instead of 'reset_devices'
to use a 'is_kdump_kernel()' function. 

Signed-off-by: Tomas Henzl <thenzl@...hat.com>