Re: Why is SU+J undesirable on SSDs?

2012-11-03 Thread Jeff Roberson
On Sat, 3 Nov 2012, Brett Glass wrote: Have been following the thread related to SU+J, and am wondering: why is it considered to be undesirable on SSDs (assuming that they have good wear leveling)? I have been enabling it on systems with SSDs, hoping that between the lack of rotating media and

Re: Why is SU+J undesirable on SSDs?

2012-11-03 Thread Jeff Roberson
On Sat, 3 Nov 2012, Karl Denninger wrote: On 11/3/2012 5:25 PM, Jeff Roberson wrote: On Sat, 3 Nov 2012, Brett Glass wrote: Have been following the thread related to SU+J, and am wondering: why is it considered to be undesirable on SSDs (assuming

Re: Why is SU+J undesirable on SSDs?

2012-11-03 Thread Jeff Roberson
On Sat, 3 Nov 2012, Ian Lepore wrote: On Sat, 2012-11-03 at 17:06 -0500, Adam Vande More wrote: On Sat, Nov 3, 2012 at 4:30 PM, Brett Glass br...@lariat.net wrote: Have been following the thread related to SU+J, and am wondering: why is it considered to be undesirable on SSDs (assuming that

Re: SchedULE vs BSD scheduler - Was: HP ProLiant DL360 G5 success stories?

2008-03-14 Thread Jeff Roberson
On Sat, 15 Mar 2008, Rong-en Fan wrote: On Sat, Mar 15, 2008 at 12:14 AM, Christopher Sean Hilton [EMAIL PROTECTED] wrote: On Mar 12, 2008, at 12:05 PM, Oliver Fromme wrote: Those machines work very well with both FreeBSD 6 and 7. If you install FreeBSD 7, remember to enable ULE instead

Re: Bug

2007-11-02 Thread Jeff Roberson
On Fri, 2 Nov 2007, Michael wrote: Hello, i know that you are working on freebsd scheduler, probably this bug have relation to your work: After upgrading to Freebsd 7 (from RELENG_6), postgresql coredumps several times per day. I asked mail list pgsql-bugs and got answer that this is probably

Re: SCHED_4BSD in RELENG_7 disturbs workflow

2007-10-16 Thread Jeff Roberson
On Tue, 16 Oct 2007, Kris Kennaway wrote: [LoN]Kamikaze wrote: I know that RELENG_7 is not considered very near-release, but I thought I'd give my 2¢ in the hope that I might have a little influence on the scheduler development to my benefit. The switch from RELENG_6 to RELENG_7 went

Re: SCHED_4BSD in RELENG_7 disturbs workflow

2007-10-16 Thread Jeff Roberson
On Tue, 16 Oct 2007, [LoN]Kamikaze wrote: Jeff Roberson wrote: On Tue, 16 Oct 2007, Kris Kennaway wrote: [LoN]Kamikaze wrote: I know that RELENG_7 is not considered very near-release, but I thought I'd give my 2¢ in the hope that I might have a little influence on the scheduler development

Re: SCHED_4BSD in RELENG_7 disturbs workflow

2007-10-16 Thread Jeff Roberson
On Tue, 16 Oct 2007, Josh Carroll wrote: Not to say that any problems that might have developed with SCHED_4BSD should not be fixed, but you should give SCHED_ULE a try since it brings benefits even for single CPU systems (e.g. better interactive response). For my particular work load, 4BSD

Re: VFS MFC testers wanted

2006-03-05 Thread Jeff Roberson
On Sat, 4 Mar 2006, Kostik Belousov wrote: On Fri, Mar 03, 2006 at 03:41:55PM -0800, Jeff Roberson wrote: I plan to MFC all of this lovely stuff for 6.1: http://www.chesapeake.net/~jroberson/vfsmfc.diff I'm looking for people who are willing to patch their stable boxes and test

VFS MFC testers wanted

2006-03-03 Thread Jeff Roberson
I plan to MFC all of this lovely stuff for 6.1: http://www.chesapeake.net/~jroberson/vfsmfc.diff I'm looking for people who are willing to patch their stable boxes and test this. This has the following changes in it: 1) Improved debugging with DEBUG_LOCKS via the new stack(9) api. 2)

Quota deadlocks.

2006-02-01 Thread Jeff Roberson
I'm not able to reproduce the quota deadlocks that were reported. Can anyone reproduce them on 7.0? I need more specific instructions on how to reproduce, or more detailed debugging info from someone who can. If you can reproduce, please add 'options DEBUG_LOCKS' to your kernel. Then get

Re: Xorg 6.8.1 and SCHED_ULE vs. SCHED_4BSD

2005-02-28 Thread Jeff Roberson
On Mon, 28 Feb 2005, Kevin Oberman wrote: Date: Sun, 27 Feb 2005 21:36:23 +0100 From: Godwin Stewart [EMAIL PROTECTED] Sender: [EMAIL PROTECTED] -BEGIN PGP SIGNED MESSAGE- Hash: SHA1 On Sat, 26 Feb 2005 21:49:00 +0100, Michael Nottebrock [EMAIL PROTECTED] wrote:

Re: Merging phk's filedesc cleanup and lock pushdown.

2005-02-26 Thread Jeff Roberson
Fixed the build and merged this. Any stable users who can should test this. I'm very confident in it, but more eyes and users are better. Thanks, Jeff On Thu, 24 Feb 2005, Francois Tigeot wrote: On Thu, Feb 24, 2005 at 03:18:49AM -0500, Jeff Roberson wrote: I am going to MFC phk's filedesc

Merging phk's filedesc cleanup and lock pushdown.

2005-02-24 Thread Jeff Roberson
I am going to MFC phk's filedesc related work in the next few days. This is required if I am ever to merge the vfs smp changes. I have a patch available at: http://www.chesapeake.net/~jroberson/fdesc.patch I'd appreciate it if anyone who can would test this. It has been running on current for

Re: Merging phk's filedesc cleanup and lock pushdown.

2005-02-24 Thread Jeff Roberson
On Thu, 24 Feb 2005, Francois Tigeot wrote: On Thu, Feb 24, 2005 at 03:18:49AM -0500, Jeff Roberson wrote: I am going to MFC phk's filedesc related work in the next few days. This is required if I am ever to merge the vfs smp changes. I have a patch available at: http