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Date:      Thu, 09 Jan 2014 18:00:31 +0200
From:      Alexander Motin <mav@FreeBSD.org>
To:        Adrian Chadd <adrian@freebsd.org>
Cc:        "svn-src-head@freebsd.org" <svn-src-head@freebsd.org>, "svn-src-all@freebsd.org" <svn-src-all@freebsd.org>, "src-committers@freebsd.org" <src-committers@freebsd.org>
Subject:   Re: svn commit: r260486 - head/etc/defaults
Message-ID:  <52CEC79F.2090708@FreeBSD.org>
In-Reply-To: <CAJ-VmokAfJVwHqdV=GojLj2EeDgU-njgVedWUBM6-Zv1mDgffw@mail.gmail.com>
References:  <201401091555.s09Fttju004938@svn.freebsd.org> <CAJ-VmokAfJVwHqdV=GojLj2EeDgU-njgVedWUBM6-Zv1mDgffw@mail.gmail.com>

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On 09.01.2014 17:57, Adrian Chadd wrote:
> .. so with say, 128 core boxes showing up, is this really a good default?

And what is the price? 16K+ of KVA per thread for thread stack, etc? 4 
threads is probably much worse default there. May be nfsd's default 
could be tuned, but obviously it should not be hardcoded value.

> On 9 January 2014 07:55, Alexander Motin <mav@freebsd.org> wrote:
>> Author: mav
>> Date: Thu Jan  9 15:55:55 2014
>> New Revision: 260486
>> URL: http://svnweb.freebsd.org/changeset/base/260486
>>
>> Log:
>>    Remove very low default limit of 4 nfsd threads.  nfsd's own default is
>>    8 * hw.ncpu, that sounds more appropriate for these SMP/NCQ/... days.
>>
>> Modified:
>>    head/etc/defaults/rc.conf
>>
>> Modified: head/etc/defaults/rc.conf
>> ==============================================================================
>> --- head/etc/defaults/rc.conf   Thu Jan  9 15:38:28 2014        (r260485)
>> +++ head/etc/defaults/rc.conf   Thu Jan  9 15:55:55 2014        (r260486)
>> @@ -311,7 +311,7 @@ nfs_client_enable="NO"              # This host is a
>>   nfs_access_cache="60"          # Client cache timeout in seconds
>>   nfs_server_enable="NO"         # This host is an NFS server (or NO).
>>   oldnfs_server_enable="NO"      # Run the old NFS server (YES/NO).
>> -nfs_server_flags="-u -t -n 4"  # Flags to nfsd (if enabled).
>> +nfs_server_flags="-u -t"       # Flags to nfsd (if enabled).
>>   mountd_enable="NO"             # Run mountd (or NO).
>>   mountd_flags="-r"              # Flags to mountd (if NFS server enabled).
>>   weak_mountd_authentication="NO"        # Allow non-root mount requests to be served.


-- 
Alexander Motin



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