Re: [PATCH 12/13] x86/jitalloc: prepare to allocate exectuatble memory as ROX

[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]

 



On Thu, Jun 01, 2023 at 08:50:39PM +0000, Edgecombe, Rick P wrote:
> > Ahh! Thanks for that; perhaps the comment in text_poke() about IPIs
> > could be a bit clearer.
> > 
> > What is it (if anything) you don't like about text_poke() then? It
> > looks
> > like it's doing broadly similar things to kmap_local(), so should be
> > in the same ballpark from a performance POV?
> 
> The way text_poke() is used here, it is creating a new writable alias
> and flushing it for *each* write to the module (like for each write of
> an individual relocation, etc). I was just thinking it might warrant
> some batching or something.

Ah, I see. A kmap_local type interface might get us that kind of
batching, if it supported mapping compound pages - currently kmap_local
still only maps single pages, but with folios getting plumbed around I
assume someone will make it handle compound pages eventually.




[Index of Archives]     [Linux Samsung SoC]     [Linux Rockchip SoC]     [Linux Actions SoC]     [Linux for Synopsys ARC Processors]     [Linux NFS]     [Linux NILFS]     [Linux USB Devel]     [Video for Linux]     [Linux Audio Users]     [Yosemite News]     [Linux Kernel]     [Linux SCSI]


  Powered by Linux