On 24/12/19 22:23, Dale wrote: > Wols Lists wrote: >> On 24/12/19 20:33, Dale wrote: >>> I think it is indexing/caching/something that requires it to look at >>> every single file in there plus all the levels below it. If so, that >>> would be a huge task. Here is some info on that but I did post it a bit >>> ago. It was sort of nested in one of the posts. >> Exactly. The thing about what this developer noticed is that it is the >> READING THE FILES that kills the system performance. The indexing is >> just random noise. >> >> So once this fix gets into the system it won't matter that it's indexing >> - the indexing will stall waiting for the files to be read, and reading >> the files won't kill the system. >> >> What seems to be happening at the moment is that as plasma reads the >> files, linux is paging plasma out to make way for the files, then it has >> to drop old cache to page plasma back in, and it's just got stuck in >> treacle trying to "in out in out shake it all about" :-) >> >> Cheers, >> Wol >> >> > > I suspect the dev that did this, has very few wallpapers or doesn't use > the feature at all and just has one pic he changes manually from time to > time. lol
Apologies, but did you bother to read what I wrote? The fault has ABSOLUTELY NOTHING to do with Plasma or KDE. I'm inclined to agree that KDE should try and work round bugs, but the real fault lies in the Linux kernel. I'm a kernel dev wannabe, and following what's going on can be VERY enlightening - this is a design fault, and I'm sure there are plenty more ... :-) it can be VERY frustrating as an app developer to find that what *should* be nice and simple is made horribly frustrating by stupid faults in the layer below. If you think about it logically, you would EXPECT that the effort of indexing a file would be substantially less than that of reading it, wouldn't you? So why would you expect reading a bunch of files and indexing them would peg *cpu* use at 100%? Surely it's going to peg disk i/o at 100%? > > Maybe later on it will be fixed. It only took a couple years for them > to add anything non-random anyway. For ages, it was random and nothing > else. I just don't have the energy right now to add several thousand > directories to the dialog one at a time. o_O > > At least we figured out what the problem is. That's a start I guess. ;-) > Well, the fix should hopefully be in the next kernel release. It then needs Plasma to take advantage of it, which shouldn't be long ... Cheers, Wol
