March 2006 - Darwin-dev - lists.apple.com

Re: On MAC 10.4 RAID type mirror after Rebuilding 100% it wont get mounted automatically..
by Rick Sulack 13 Mar '06

13 Mar '06

site_archiver(a)lists.apple.com Delivered-To: Darwin-dev(a)lists.apple.com On Mar 13, 2006, at 1:54 AM, Gaurav Kumar wrote: hi all, On MAC OSX 10.4 if i repair a damaged RAID using diskutil command as diskutil repairMirror diskx disky. Rebiulding starts properly and when it is 100% Complete. Diskutil checkRAID shows status of RAID disk as Offline i.e not mounted. After i have to execute diskutil mountDisk to make it mounted. so,suggest me what should i do so that after rebuilding is complete, disk gets automatically mounted on MAC 10.4. -rick __ rick sulack darwin core os group apple computer, inc A: Because it messes up the order in which people normally read text. Q: Why is top-posting such a bad thing? A: Top-posting. Q: What is the most annoying thing on usenet and in e-mail? _______________________________________________ Do not post admin requests to the list. They will be ignored. Darwin-dev mailing list (Darwin-dev(a)lists.apple.com) Help/Unsubscribe/Update your Subscription: http://lists.apple.com/mailman/options/darwin-dev/site_archiver%40lists.app… While on 10.3.3 after completion of diskutil repairMirror the status of disk is mounted. We don't have to expilicitly fire diskutil mountDisk to make it mounted again. In 10.3.2 (7E46) we added support for live mirror rebuilding. 10.4 also has support for live mirror rebuilding. However, most of the RAID code was re-written for 10.4, it supports some new features like RAID 10, 0+1, JBOD, ... For both 10.3.2+ (7E46) and 10.4.x the need to first unmount the mirrored volume is no longer necessary. Releases older than 10.3.2 had to rebuild mirrors unmounted so the code was most likely remounting the volumes prior to 10.3.2 when the rebuild completed. Since you are talking about 10.3.3, my best guess that this was a bug outside of the RAID code that was fixed in 10.4, since a unmounted volume should probably stay that way. The easiest fix might be to not unmount the volume before rebuilding it on 10.4. Unmounting a mirrored volume on 10.4 before rebuilding is not a bad thing though. Live rebuilding was added mostly to allow rebuilding boot volumes. Depending on much normal i/o activity occurring on the volume during the rebuild, the rebuild could take longer if it is mounted. So it is best to try to minimize the extra i/o while rebuilding if you can. This email sent to site_archiver(a)lists.apple.com

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On MAC 10.4 RAID type mirror after Rebuilding 100% it wont get mounted automatically..
by Gaurav Kumar 13 Mar '06

13 Mar '06

site_archiver(a)lists.apple.com Delivered-To: Darwin-dev(a)lists.apple.com Organization: hi all, On MAC OSX 10.4 if i repair a damaged RAID using diskutil command as diskutil repairMirror diskx disky. Rebiulding starts properly and when it is 100% Complete. Diskutil checkRAID shows status of RAID disk as Offline i.e not mounted. After i have to execute diskutil mountDisk to make it mounted. While on 10.3.3 after completion of diskutil repairMirror the status of disk is mounted. We don't have to expilicitly fire diskutil mountDisk to make it mounted again. so,suggest me what should i do so that after rebuilding is complete, disk gets automatically mounted on MAC 10.4. gaurav _______________________________________________ Do not post admin requests to the list. They will be ignored. Darwin-dev mailing list (Darwin-dev(a)lists.apple.com) Help/Unsubscribe/Update your Subscription: http://lists.apple.com/mailman/options/darwin-dev/site_archiver%40lists.app… This email sent to site_archiver(a)lists.apple.com

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Re: INT3 not calling SIGTRAP handler?
by Eric Albert 13 Mar '06

13 Mar '06

site_archiver(a)lists.apple.com Delivered-To: darwin-dev(a)lists.apple.com On Mar 12, 2006, at 11:25 PM, Cyrus Harmon wrote: -Eric _______________________________________________ Do not post admin requests to the list. They will be ignored. Darwin-dev mailing list (Darwin-dev(a)lists.apple.com) Help/Unsubscribe/Update your Subscription: http://lists.apple.com/mailman/options/darwin-dev/site_archiver%40lists.app… This may sound a bit sketchy, as it only happens somewhat sporadically, but when it happens, bad things happen. I'm working on an x86 port of a compiler that makes heavy use of trapping in it's runtime environment and things basically seem to work pretty well at this point. My problem is that every now and then, I try to trap with an x86 INT3 (opcode CC) and our SIGTRAP handler takes a look at the byte following the CC, gets the appropriate "arguments" by looking at the instruction data just after the EIP, fixes up the EIP to skip over these arguments and goes on its merry way. This all works well enough, except when it doesn't, which is to say that occasionally it seems that I just walk across the INT3 without the SIGTRAP handler being called, and get a SEGV when the CPU tries to execute the instruction immediately following the INT3, which was supposed to be skipped over by the code that fixes up the EIP in the signal handler. Yes, this is all a bit messy, but the frustrating part is that most of the time this works. Is anyone else seeing instances where INT3 traps aren't being called? I don't think we have any bug reports on this. It'd be great to have one with a reproducible test case, even if it's along the lines of "this shows up about 10% of the time with this test". Any suggestions on where to look in the Darwin sources to see if there's anything amiss? This works fine on Darwin/ppc and, FWIW, {freebsd,linux}/x86 and mostly works on Darwin/x86, but this one thing is causing some rather major problems. Any suggestions or advice on dealing with this would be greatly appreciated. You'd need the kernel source, which I'm afraid isn't available yet for the Intel releases of Mac OS X. You could look at the older Darwin/x86 kernel sources, but enough has changed since then that it wouldn't be helpful. This email sent to site_archiver(a)lists.apple.com

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INT3 not calling SIGTRAP handler?
by Cyrus Harmon 13 Mar '06

13 Mar '06

site_archiver(a)lists.apple.com Delivered-To: darwin-dev(a)lists.apple.com Also, forgive me if I have my x86 terminology wrong here. Thanks, Cyrus _______________________________________________ Do not post admin requests to the list. They will be ignored. Darwin-dev mailing list (Darwin-dev(a)lists.apple.com) Help/Unsubscribe/Update your Subscription: http://lists.apple.com/mailman/options/darwin-dev/site_archiver%40lists.app… This may sound a bit sketchy, as it only happens somewhat sporadically, but when it happens, bad things happen. I'm working on an x86 port of a compiler that makes heavy use of trapping in it's runtime environment and things basically seem to work pretty well at this point. My problem is that every now and then, I try to trap with an x86 INT3 (opcode CC) and our SIGTRAP handler takes a look at the byte following the CC, gets the appropriate "arguments" by looking at the instruction data just after the EIP, fixes up the EIP to skip over these arguments and goes on its merry way. This all works well enough, except when it doesn't, which is to say that occasionally it seems that I just walk across the INT3 without the SIGTRAP handler being called, and get a SEGV when the CPU tries to execute the instruction immediately following the INT3, which was supposed to be skipped over by the code that fixes up the EIP in the signal handler. Yes, this is all a bit messy, but the frustrating part is that most of the time this works. Is anyone else seeing instances where INT3 traps aren't being called? Any suggestions on where to look in the Darwin sources to see if there's anything amiss? This works fine on Darwin/ppc and, FWIW, {freebsd,linux}/x86 and mostly works on Darwin/ x86, but this one thing is causing some rather major problems. Any suggestions or advice on dealing with this would be greatly appreciated. This email sent to site_archiver(a)lists.apple.com

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Re: different FD_SETSIZE on a remote than a local disk?
by jmzorko＠mac.com 12 Mar '06

12 Mar '06

site_archiver(a)lists.apple.com Delivered-To: darwin-dev(a)lists.apple.com Jordan, Regards, John Falling You - exploring the beauty of voice and sound http://www.fallingyou.com _______________________________________________ Do not post admin requests to the list. They will be ignored. Darwin-dev mailing list (Darwin-dev(a)lists.apple.com) Help/Unsubscribe/Update your Subscription: http://lists.apple.com/mailman/options/darwin-dev/site_archiver%40lists.app… However, i'm running into a problem -- the C++ server can create the test files (i've successfully tested up to 10000 of them on my 1.5ghz 12" PowerBook, and it can go much higher than that I think) fine on the local disk, but when trying to do so on a remote disk (my dual 2ghz G5, across AE), it can't make any more than 1248. This is with the filedescriptor limit set to 10000 (via /bin/csh limit), so it appears that the filedescriptor limit that csh sets isn't honored on a remote disk. What's the point of registering kqueue() notifications against files on a remote disk? If you modify them on the system doing the monitoring then fine, it will catch them, but if any other client of that remote filesystem (or the server machine itself) modifies them, you won't. Yeah, I started suspecting that and it makes sense ... the files are on the G5, it's the G5s xnu that is handling the kqueue / kevent stuff, and it's kernel and the kernel on my PowerBook don't have some sort of psychic mindlink (that I know of, anyway) :-) I still don't know about the filedescriptor limit, though ... i'm going to research that more. It's also not very performant to monitor 1000's of files like this. You can do it this way, but the overheads are non-trivial. I'm just fascinated with very scalable servers, is all -- C10K and stuff like that. I like to see exactly how many simultaneous connections a machine / OS can handle, and i'm always trying to push it just a little bit more. I figured a quick test with files would give me some indication of how far kqueue / kevent can scale with regards to multiplexing than say, epoll() or the venerable select(). I'd also like to try pools of kqueues, and see if 10 of them monitoring 1000 FDs scales better than 1 handling 10000, and how kqueue / kevent compare with modwatch(). I'm silly * eyes roll out of sync with one another * :-) This email sent to site_archiver(a)lists.apple.com

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Re: different FD_SETSIZE on a remote than a local disk?
by Jordan K. Hubbard 12 Mar '06

12 Mar '06

site_archiver(a)lists.apple.com Delivered-To: darwin-dev(a)lists.apple.com _______________________________________________ Do not post admin requests to the list. They will be ignored. Darwin-dev mailing list (Darwin-dev(a)lists.apple.com) Help/Unsubscribe/Update your Subscription: http://lists.apple.com/mailman/options/darwin-dev/site_archiver%40lists.app… This email sent to site_archiver(a)lists.apple.com

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different FD_SETSIZE on a remote than a local disk?
by jmzorko＠mac.com 12 Mar '06

12 Mar '06

site_archiver(a)lists.apple.com Delivered-To: darwin-dev(a)lists.apple.com Hello, all ... Is this true, or am I not understanding completely what's going on? Regards, John Falling You - exploring the beauty of voice and sound http://www.fallingyou.com _______________________________________________ Do not post admin requests to the list. They will be ignored. Darwin-dev mailing list (Darwin-dev(a)lists.apple.com) Help/Unsubscribe/Update your Subscription: http://lists.apple.com/mailman/options/darwin-dev/site_archiver%40lists.app… In my kqueue / kevent tests, i'm seeing how many events I can process per second. However, i'm now trying to run the client (a simple Perl script that touches 1000s of files that the C++ server is monitoring qith kqueue / kevent) on a separate pooter, so I can get a better feel for how high I can scale the server. However, i'm running into a problem -- the C++ server can create the test files (i've successfully tested up to 10000 of them on my 1.5ghz 12" PowerBook, and it can go much higher than that I think) fine on the local disk, but when trying to do so on a remote disk (my dual 2ghz G5, across AE), it can't make any more than 1248. This is with the filedescriptor limit set to 10000 (via /bin/csh limit), so it appears that the filedescriptor limit that csh sets isn't honored on a remote disk. This email sent to site_archiver(a)lists.apple.com

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Re: Possible to debug darwin using xcode?
by Alexander von Below 12 Mar '06

12 Mar '06

site_archiver(a)lists.apple.com Delivered-To: darwin-dev(a)lists.apple.com Debug->Attach You should be able to attach to your process nicely. Alex Am 12.03.2006 um 15:04 schrieb Robert Nicholson: I was wanting to debug gnutar-433 is this possible under xcode? _______________________________________________ Do not post admin requests to the list. They will be ignored. Darwin-dev mailing list (Darwin-dev(a)lists.apple.com) Help/Unsubscribe/Update your Subscription: http://lists.apple.com/mailman/options/darwin-dev/below%40mac.com _______________________________________________ Do not post admin requests to the list. They will be ignored. Darwin-dev mailing list (Darwin-dev(a)lists.apple.com) Help/Unsubscribe/Update your Subscription: http://lists.apple.com/mailman/options/darwin-dev/site_archiver%40lists.app… This question is for the xcode-users list, but the newer versions of Xcode have a nice feature: This email sent to below(a)mac.com This email sent to site_archiver(a)lists.apple.com

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Re: Possible to debug darwin using xcode?
by Finlay Dobbie 12 Mar '06

12 Mar '06

site_archiver(a)lists.apple.com Delivered-To: darwin-dev(a)lists.apple.com Domainkey-signature: a=rsa-sha1; q=dns; c=nofws; s=beta; d=gmail.com; h=received:message-id:date:from:reply-to:to:subject:cc:in-reply-to:mime-version:content-type:content-transfer-encoding:content-disposition:references; b=FUi5aTUHo/Wn6HmcnwBSOr/o6EG1zdueKl1o3p2NJuyLvPLQBa9s7R+AVkrTD8czyzox72RWG2/QN4NTsegt7B5NH8wEfhpbR8ES64mxqizSPwn/VFI2PHUeG295T6aaABDxXeqVtvTpKJ+5b6ANwE0+2XoCCu7lB+XorBqqrZ0= On 3/12/06, Robert Nicholson <robert(a)elastica.com> wrote: > I was wanting to debug gnutar-433 is this possible under xcode? Xcode is not part of Darwin, and so this question probably falls outside the scope of this list. You might want to try the xcode-users mailing list, or use gdb. -- Finlay _______________________________________________ Do not post admin requests to the list. They will be ignored. Darwin-dev mailing list (Darwin-dev(a)lists.apple.com) Help/Unsubscribe/Update your Subscription: http://lists.apple.com/mailman/options/darwin-dev/site_archiver%40lists.app… This email sent to site_archiver(a)lists.apple.com

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Possible to debug darwin using xcode?
by Robert Nicholson 12 Mar '06

12 Mar '06

site_archiver(a)lists.apple.com Delivered-To: darwin-dev(a)lists.apple.com I was wanting to debug gnutar-433 is this possible under xcode? _______________________________________________ Do not post admin requests to the list. They will be ignored. Darwin-dev mailing list (Darwin-dev(a)lists.apple.com) Help/Unsubscribe/Update your Subscription: http://lists.apple.com/mailman/options/darwin-dev/site_archiver%40lists.app… This email sent to site_archiver(a)lists.apple.com

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