Re: [gentoo-user] Controlling emerges
On Thu, Sep 21, 2023 at 9:13 PM Dale wrote: > > Sometimes I wish they would announce when they add features. Rich, you > frequent this list. If you hear of something new, could you post it? Sure, if a relevant topic comes up and I'm aware of it. However, I doubt this setting is going to do much that nice doesn't already do. The original focus seemed to be on memory use, and niceness will not have any impact on the memory use of a build. The only thing that will is reducing the number of parallel jobs. There really isn't any way to get portage to regulate memory use short of letting it be killed (which isn't helpful), maybe letting it being stopped when things get out of hand (which will help as the memory could at least be swapped, but the build might not be salvageable without jumping through a lot of hoops), or if the package maintainer provides some kind of hinting to the package manager so that it can anticipate how much memory it will use. Otherwise trying to figure out how much memory a build system will use without just trying it is like solving the halting problem. -- Rich
Re: [gentoo-user] Controlling emerges
On Friday, 22 September 2023 02:13:08 BST Dale wrote:
> Tsukasa Mcp_Reznor wrote:
> > So I feel I should add my own 2 cents to the pileor possibly 25 cents
> > due to inflation.
> >
> >
> > PORTAGE_IONICE_COMMAND="ionice -c 3 -p \${PID}"
> > PORTAGE_SCHEDULING_POLICY="idle"
> >
> > Those 2 together in make.conf have had a noticeable effect on multitasking
> > for me. I still wouldn't recommend allocating all of your cores to
> > emerge, but emerging with idle priority keeps your tasks a little higher
> > up in the mix.
> >
> >
> > From: Laurence Perkins
> > Sent: Thursday, September 21, 2023 3:26 PM
> > To: gentoo-user@lists.gentoo.org
> > Subject: RE: [gentoo-user] Controlling emerges
>
> I had the first one, little different for my rig, but I added the second
> one just now. I'll be testing this tomorrow or Sunday, depending on
> packages, maybe both. lol
>
> Sometimes I wish they would announce when they add features. Rich, you
> frequent this list. If you hear of something new, could you post it?
> This may not be NEW but it is new to me. No idea when it got added.
>
> Dale
>
> :-) :-)
Loads of tweaks are described here, which I wasn't aware of:
https://wiki.gentoo.org/wiki/Portage_niceness
As well as the man pages for make.conf and sched. I'm not sure what default
values are, if these variables are not set in make.conf.
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Re: [gentoo-user] Re: How to move ext4 partition
On 20/09/2023 23:39, Grant Edwards wrote: Assuming GParted is smart enough to do overlapping moves, is it smart enough to only copy filesystem data and not copy "empty" sectors? According to various forum posts, it is not: moving a partion copies every sector. [That's certainly the obvious, safe thing to do.] Seeing as it knows nothing about filesystems, and everything about partitions, it will treat the partition as an opaque blob and move it as a single object ... The partition in question is 200GB, but only 7GB is used, so I think backup/restore is the way to go... You would think so :-) I use ext4, and make heavy use of hard links. Last time I tried a straight copy (not backup/restore) I think the copied partition would have been three times the size of the original - that is if it hadn't run out of space first :-) But it sounds like that would work well for you. Cheers, Wol
