MorphOS : : ram-handler root directory fix
Posted By: Piru. on 2021/7/23 14:09:27
MorphOS 3.15 ram-handler contains a bug that when unlucky may results in the RAM: root directory to appear to contain many duplicate entries. Multiple users had reported this over the years, but until recently the root cause of this issue had eluded us. Due to recent developments, the bug has finally been located and fixed (thanks to AngryTom for help!).

Fixed ram-handler will be released as the part of the future MorphOS 3.16 release. Meanwhile you can install the following patch that fixes the problem for MorphOS 3.15:

ramrootfix.lha

To install it, extract the archive and drag & drop "ramrootfix" to SYS:WBStartup.
 
  • Paladin of the Pegasos
    Paladin of the Pegasos
    NewSense
    Joined: 2012/11/10
    Posts: 1149
    From: Manchester, UK/GB
    Thanks for the fix, which I too had noticed, but hadn't actually reported to "Bug HQ" as I wasn't sure what I would say about its sporadic appearance in the RAM: directory, but it's nice to know it's been tracked down and is going to be gone from the OS from now on. 8-D
    MacMini 1.5GHz,10,2,64MB VRAM,1GB,Airport, Bluetooth,A1016 Keyboard,T-RB22 Mouse,DVD-RW-DL+CD-RW,Iomega MiniMax,Belkin 6 port 3 x Firewire/3 x, USB2, MorphOS 3.12, Mac OSX 10.4/10.5, A1138+A1139 PwrBk MOS v3.12,Model 5,8/5,9, & PowerMac G5 2.3GHz(DP)
  • »2021/7/25 0:54
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  • Paladin of the Pegasos
    Paladin of the Pegasos
    NewSense
    Joined: 2012/11/10
    Posts: 1149
    From: Manchester, UK/GB
    I have had a few weird instances since I installed the ramrootfix.lha file in WBStartup.

    It may not be due to the fix, but I have been using MorphOS now for about 8 years and these 3 moments have never occurred prior to installing the "fix" in WBStartup, and as far as I know I have not installed anything new on my system recently that was likely to cause the following events;

    1. unable to move an icon to a free area of Ambient with the mouse. It kept jumping back to the position it was in previously. Later, without rebooting, this process worked OK, same Ambient desktop, same icon.
    2. Unable to move an Ambient icon when using/pressing the keyboard keys (Cmd+Alt) as virtual mouse, the cursor moves but does not subsequently move the icon, the cursor slides over Ambient desktop, and the icon remains where it was. Here again, a bit later, without rebooting, this process worked OK, same Ambient desktop, same icon.
    3. Swapping from one partition/directory where I had added an icon to a folder, I then went to the mirrored partition/directory to find that the icon had seemingly been added there, but on re-loading the second/mirrored directory the icon had vanished (never been there, but was like a mirage, of sorts, over the directory/folder). I was able to add the icon, but I cannot explain why the icon was seemingly in the second storage partition/directory when I had not copied it there, and it then became apparent that it was not actually there, which seems really weird/puzzling. :-?
    MacMini 1.5GHz,10,2,64MB VRAM,1GB,Airport, Bluetooth,A1016 Keyboard,T-RB22 Mouse,DVD-RW-DL+CD-RW,Iomega MiniMax,Belkin 6 port 3 x Firewire/3 x, USB2, MorphOS 3.12, Mac OSX 10.4/10.5, A1138+A1139 PwrBk MOS v3.12,Model 5,8/5,9, & PowerMac G5 2.3GHz(DP)
  • »2021/7/30 8:53
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  • MorphOS Developer
    Piru
    Joined: 2003/2/24
    Posts: 500
    From: finland, the l...
    Your issues are unrelated to ramrootfix.
  • »2021/7/30 11:32
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  • Paladin of the Pegasos
    Paladin of the Pegasos
    NewSense
    Joined: 2012/11/10
    Posts: 1149
    From: Manchester, UK/GB
    @ Piru - Any idea what they are related to? :-?
    MacMini 1.5GHz,10,2,64MB VRAM,1GB,Airport, Bluetooth,A1016 Keyboard,T-RB22 Mouse,DVD-RW-DL+CD-RW,Iomega MiniMax,Belkin 6 port 3 x Firewire/3 x, USB2, MorphOS 3.12, Mac OSX 10.4/10.5, A1138+A1139 PwrBk MOS v3.12,Model 5,8/5,9, & PowerMac G5 2.3GHz(DP)
  • »2021/7/31 2:14
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  • Yokemate of Keyboards
    Yokemate of Keyboards
    takemehomegrandma
    Joined: 2003/2/24
    Posts: 2697
    From:
    @Piru

    You guys in the MorphOS Team rule! You haven't dropped the ball in all these years, always squeezing bugs out, striving for perfection. Please do continue! :-)
    MorphOS is Amiga done right! :-)
    MorphOS NG will be AROS done right! :-)
  • »2021/8/1 22:52
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  • MorphOS Developer
    geit
    Joined: 2004/9/23
    Posts: 956
    From:
    Quote:

    @ Piru - Any idea what they are related to? :-?


    There is probably some other application causing trouble. You installed the patch, which changes the memory usage, as it probably fills a very small area of memory. Some other application loaded later on is now using a different memory area.

    Normally this is not an issue, but if the application is faulty and using more memory than allocated from the OS. Do to the change of memory chunks the illegal overwritten memory is different. Probably ambient memory areas get partly overwritten and causing your issues.

    Finding the faulty application is not so easy, as by disabling any application you may change the order of used memory chunks, so even when removing a working application the problem could appear as gone, but only because the faulty application is overwriting less important data. As a result problems and crashes may not appear right away, but for sure cause trouble.

    You can use a tool like MungWall to find the broken application. It is required to run this tool as soon as possible during boot, so a maximum amount of memory chunks can be put under survailance. It will slow down your computer a little, as it checks every memory section for leaks, when closing applications. In most cases it will point out problematic applications.
  • »2021/8/1 23:56
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