Re: [PATCH] CPU hot swap for 2.4.3 + s390 support

2001-05-07 Thread Bruce Harada
> > >How far away is the capability to "teleport" processes from one machine to > > >another over the network? Think of the uptime! > > > > > > > It is here. Look at Mosix. > > No. Not for uptime. > > The "responsibility" for process completion does not get delegated. A process > will

Re: [PATCH] CPU hot swap for 2.4.3 + s390 support

2001-05-07 Thread Bruce Harada
How far away is the capability to teleport processes from one machine to another over the network? Think of the uptime! It is here. Look at Mosix. No. Not for uptime. The responsibility for process completion does not get delegated. A process will always be bound to it's

Re: [PATCH] CPU hot swap for 2.4.3 + s390 support

2001-05-06 Thread Jakob Østergaard
On Sun, May 06, 2001 at 10:06:42AM -0700, Ben Ford wrote: > Dwayne C. Litzenberger wrote: > > >Hey, this is cool. > > > >How far away is the capability to "teleport" processes from one machine to > >another over the network? Think of the uptime! > > > > It is here. Look at Mosix. No. Not

Re: [PATCH] CPU hot swap for 2.4.3 + s390 support

2001-05-06 Thread Ben Ford
Dwayne C. Litzenberger wrote: >Hey, this is cool. > >How far away is the capability to "teleport" processes from one machine to >another over the network? Think of the uptime! > It is here. Look at Mosix. -- I'd rather listen to Newton than to Mundie [MS flunkie who made a speech on the

Re: [PATCH] CPU hot swap for 2.4.3 + s390 support

2001-05-06 Thread David Woodhouse
[EMAIL PROTECTED] said: > How do you relocate > -- pages which are mlocked without violating RT contraints? > -- pages which contain kernel pointers and might be accessed from > interrupt context? Those two are the same problem, essentially. You have to copy the page, then map it

Re: [PATCH] CPU hot swap for 2.4.3 + s390 support

2001-05-06 Thread Stephen Beynon
On Sun, 6 May 2001, Aaron Lehmann wrote: > On Sat, May 05, 2001 at 10:43:27AM -0400, Peter Rival wrote: > > Has anyone looked into memory hot swap/hot add support? > > How do you hotswap RAM? What happens to the data that was on the > removed memory module? Dont know about the s390 - but on

Re: [PATCH] CPU hot swap for 2.4.3 + s390 support

2001-05-06 Thread Aaron Lehmann
On Sun, May 06, 2001 at 01:15:53AM -0600, Dwayne C. Litzenberger wrote: > Hey, this is cool. > > How far away is the capability to "teleport" processes from one machine to > another over the network? Think of the uptime! http://www.mosix.org - To unsubscribe from this list: send the line

Re: [PATCH] CPU hot swap for 2.4.3 + s390 support

2001-05-06 Thread Aaron Lehmann
On Sat, May 05, 2001 at 10:43:27AM -0400, Peter Rival wrote: > Has anyone looked into memory hot swap/hot add support? How do you hotswap RAM? What happens to the data that was on the removed memory module? - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of

Re: [PATCH] CPU hot swap for 2.4.3 + s390 support

2001-05-06 Thread Dwayne C. Litzenberger
Hey, this is cool. How far away is the capability to "teleport" processes from one machine to another over the network? Think of the uptime! -- Dwayne C. Litzenberger - [EMAIL PROTECTED] PGP signature

Re: [PATCH] CPU hot swap for 2.4.3 + s390 support

2001-05-06 Thread Dwayne C. Litzenberger
Hey, this is cool. How far away is the capability to teleport processes from one machine to another over the network? Think of the uptime! -- Dwayne C. Litzenberger - [EMAIL PROTECTED] PGP signature

Re: [PATCH] CPU hot swap for 2.4.3 + s390 support

2001-05-06 Thread Aaron Lehmann
On Sat, May 05, 2001 at 10:43:27AM -0400, Peter Rival wrote: Has anyone looked into memory hot swap/hot add support? How do you hotswap RAM? What happens to the data that was on the removed memory module? - To unsubscribe from this list: send the line unsubscribe linux-kernel in the body of a

Re: [PATCH] CPU hot swap for 2.4.3 + s390 support

2001-05-06 Thread Aaron Lehmann
On Sun, May 06, 2001 at 01:15:53AM -0600, Dwayne C. Litzenberger wrote: Hey, this is cool. How far away is the capability to teleport processes from one machine to another over the network? Think of the uptime! http://www.mosix.org - To unsubscribe from this list: send the line unsubscribe

Re: [PATCH] CPU hot swap for 2.4.3 + s390 support

2001-05-06 Thread Stephen Beynon
On Sun, 6 May 2001, Aaron Lehmann wrote: On Sat, May 05, 2001 at 10:43:27AM -0400, Peter Rival wrote: Has anyone looked into memory hot swap/hot add support? How do you hotswap RAM? What happens to the data that was on the removed memory module? Dont know about the s390 - but on some

Re: [PATCH] CPU hot swap for 2.4.3 + s390 support

2001-05-06 Thread David Woodhouse
[EMAIL PROTECTED] said: How do you relocate -- pages which are mlocked without violating RT contraints? -- pages which contain kernel pointers and might be accessed from interrupt context? Those two are the same problem, essentially. You have to copy the page, then map it into

Re: [PATCH] CPU hot swap for 2.4.3 + s390 support

2001-05-06 Thread Ben Ford
Dwayne C. Litzenberger wrote: Hey, this is cool. How far away is the capability to teleport processes from one machine to another over the network? Think of the uptime! It is here. Look at Mosix. -- I'd rather listen to Newton than to Mundie [MS flunkie who made a speech on the evil-ness

Re: [PATCH] CPU hot swap for 2.4.3 + s390 support

2001-05-06 Thread Jakob Østergaard
On Sun, May 06, 2001 at 10:06:42AM -0700, Ben Ford wrote: Dwayne C. Litzenberger wrote: Hey, this is cool. How far away is the capability to teleport processes from one machine to another over the network? Think of the uptime! It is here. Look at Mosix. No. Not for uptime. The

Re: [PATCH] CPU hot swap for 2.4.3 + s390 support

2001-05-05 Thread Rik van Riel
On Sun, 6 May 2001, Chris Wedgwood wrote: > On Sat, May 05, 2001 at 11:19:09PM -0300, Rik van Riel wrote: > > This only leaves two issues, the first is device drivers and the > second is the question whether we'd want the overhead needed to > implement the (fairly easy) memory

Re: [PATCH] CPU hot swap for 2.4.3 + s390 support

2001-05-05 Thread Rik van Riel
On Sun, 6 May 2001, Chris Wedgwood wrote: > On Sat, May 05, 2001 at 11:34:16AM -0500, Mitch Adair wrote: > > Wouldn't that be lot of the same issues as a "swapoff" with some > portion of that in use? (except for the kernel data case of > course...) > > No. Swapoff makes pages

Re: [PATCH] CPU hot swap for 2.4.3 + s390 support

2001-05-05 Thread Rik van Riel
On Sat, 5 May 2001, Mitch Adair wrote: > Wouldn't that be lot of the same issues as a "swapoff" with some > portion of that in use? (except for the kernel data case of > course...) Basically, yes. regards, Rik -- Virtual memory is like a game you can't win; However, without VM there's truly

Re: [PATCH] CPU hot swap for 2.4.3 + s390 support

2001-05-05 Thread Rik van Riel
On Sun, 6 May 2001, Chris Wedgwood wrote: > On Sat, May 05, 2001 at 10:43:27AM -0400, Peter Rival wrote: > > Has anyone looked into memory hot swap/hot add support? > > Adding memory probably isn't going to be too hard... but taking > existing memory off line is tricky. You have to find

Re: [PATCH] CPU hot swap for 2.4.3 + s390 support

2001-05-05 Thread Peter Rival
Chris Wedgwood wrote: > On Sat, May 05, 2001 at 10:43:27AM -0400, Peter Rival wrote: > > Has anyone looked into memory hot swap/hot add support? > > Adding memory probably isn't going to be too hard... but taking > existing memory off line is tricky. You have to find some way of > finding

Re: [PATCH] CPU hot swap for 2.4.3 + s390 support

2001-05-05 Thread Mitch Adair
> Adding memory probably isn't going to be too hard... but taking > existing memory off line is tricky. You have to find some way of > finding all the pages that are in use and then dealing with them > appropriately, and when some are locked or contain kernel data this > would be extremely

Re: [PATCH] CPU hot swap for 2.4.3 + s390 support

2001-05-05 Thread Peter Rival
Has anyone looked into memory hot swap/hot add support? Especially with systems with Chipkill coming out, this would be great to support... - Pete Anton Blanchard wrote: > Hi, > > You can find a new version of the hot swap cpu patch at: > >

[PATCH] CPU hot swap for 2.4.3 + s390 support

2001-05-05 Thread Anton Blanchard
Hi, You can find a new version of the hot swap cpu patch at: http://samba.org/~anton/patches/cpu_hotswap-2.4.3-patch The version for s390 (you need to first apply the 2.4.3 kernel patch available on the IBM s390 Linux website) is at:

[PATCH] CPU hot swap for 2.4.3 + s390 support

2001-05-05 Thread Anton Blanchard
Hi, You can find a new version of the hot swap cpu patch at: http://samba.org/~anton/patches/cpu_hotswap-2.4.3-patch The version for s390 (you need to first apply the 2.4.3 kernel patch available on the IBM s390 Linux website) is at:

Re: [PATCH] CPU hot swap for 2.4.3 + s390 support

2001-05-05 Thread Peter Rival
Has anyone looked into memory hot swap/hot add support? Especially with systems with Chipkill coming out, this would be great to support... - Pete Anton Blanchard wrote: Hi, You can find a new version of the hot swap cpu patch at: http://samba.org/~anton/patches/cpu_hotswap-2.4.3-patch

Re: [PATCH] CPU hot swap for 2.4.3 + s390 support

2001-05-05 Thread Mitch Adair
Adding memory probably isn't going to be too hard... but taking existing memory off line is tricky. You have to find some way of finding all the pages that are in use and then dealing with them appropriately, and when some are locked or contain kernel data this would be extremely difficult I

Re: [PATCH] CPU hot swap for 2.4.3 + s390 support

2001-05-05 Thread Peter Rival
Chris Wedgwood wrote: On Sat, May 05, 2001 at 10:43:27AM -0400, Peter Rival wrote: Has anyone looked into memory hot swap/hot add support? Adding memory probably isn't going to be too hard... but taking existing memory off line is tricky. You have to find some way of finding all the

Re: [PATCH] CPU hot swap for 2.4.3 + s390 support

2001-05-05 Thread Rik van Riel
On Sun, 6 May 2001, Chris Wedgwood wrote: On Sat, May 05, 2001 at 10:43:27AM -0400, Peter Rival wrote: Has anyone looked into memory hot swap/hot add support? Adding memory probably isn't going to be too hard... but taking existing memory off line is tricky. You have to find some way

Re: [PATCH] CPU hot swap for 2.4.3 + s390 support

2001-05-05 Thread Rik van Riel
On Sat, 5 May 2001, Mitch Adair wrote: Wouldn't that be lot of the same issues as a swapoff with some portion of that in use? (except for the kernel data case of course...) Basically, yes. regards, Rik -- Virtual memory is like a game you can't win; However, without VM there's truly

Re: [PATCH] CPU hot swap for 2.4.3 + s390 support

2001-05-05 Thread Rik van Riel
On Sun, 6 May 2001, Chris Wedgwood wrote: On Sat, May 05, 2001 at 11:34:16AM -0500, Mitch Adair wrote: Wouldn't that be lot of the same issues as a swapoff with some portion of that in use? (except for the kernel data case of course...) No. Swapoff makes pages allocated to

Re: [PATCH] CPU hot swap for 2.4.3 + s390 support

2001-05-05 Thread Rik van Riel
On Sun, 6 May 2001, Chris Wedgwood wrote: On Sat, May 05, 2001 at 11:19:09PM -0300, Rik van Riel wrote: This only leaves two issues, the first is device drivers and the second is the question whether we'd want the overhead needed to implement the (fairly easy) memory relocation.