Re: lvmpolld causes high cpu load issue

Dne 17. 08. 22 v 19:35 Gionatan Danti napsal(a):
> Il 2022-08-17 17:26 Zdenek Kabelac ha scritto:
>>> I like the general idea of the udev watch. It is the magic that causes
>>> newly created partitions to magically appear in the system, which is
> 
> Would disabling the watch rule be a reasonable approach in this case? If the 
> user want to scan a new device, it only needs to issue partprobe or kpartx, or 
> am I missing something?

Before diving into these 'deep waters'  - I'd really like to first see if the 
problem is still such an issue with our upstream code base.

There have been lot of minor optimization committed over the time - so the 
amount of fired 'watch' rules should be considerably smaller then the version 
mentioned in customer issue.

>> There is on going  'SID' project - that might push the logic somewhat
>> further, but existing 'device' support logic as is today is
>> unfortunate 'trace' of how the design should not have been made - and
>> since all 'original' programmers left the project long time ago - it's
>> non-trivial to push things forward.
> 
> Well, this is not good news. Just for my education, it is possibile to run a 
> modern linux distro without udev at all? I still remember when the new cool 
> thing for device autodiscovery was devfs (with some distro - like gentoo - 
> taking the alternative approach to simply tarrig & untarring much of the 
> entire /dev/ files to prepopulate the major+minor number... >
>> We just hope the SID will make some progress (although probably small
>> one at the beginning).
> 
> Any info on the project?

https://github.com/prajnoha/sid


Zdenek

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