lkml.org 
[lkml]   [2021]   [Jul]   [22]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
    /
    Date
    From
    SubjectRe: [PATCH 00/17] Rust support
    On Thu, Jul 22, 2021 at 11:55:58PM +0100, Wedson Almeida Filho wrote:
    > Hey Matthew,
    >
    > On Thu, Jul 08, 2021 at 01:58:32AM +0100, Matthew Wilcox wrote:
    > > Why are you so resistant to writing a real driver that deals with actual
    > > hardware?
    >
    > I don't think it was so much resistance but rather a prioritisation thing. Have
    > you by any chance seen the gpio driver I posted a couple of days ago?

    I haven't seen it, no ...

    > > A simple NVMe driver is less than a thousand lines of C.
    > > I know the one in the kernel now is ridiculously complicated and has
    > > been thoroughly messed up with abstractions to support NVMeoF instead
    > > of having a separate driver, but it's really a simple interface at heart.
    >
    > The latest NVMe spec is 452 pages long, which seems to contradict your claim
    > that it's simple.

    As I said, they've put all kinds of crap into NVMe these days.
    If you look at the 1.0e spec, it's 127 pages.

    > In any case, translating less than 1K lines of C shouldn't be
    > too hard (after I've built the abstractions, of course). Would you mind sharing
    > the simple driver you mention above?

    Unfortunately, most of the early versions were lost during the
    kernel.org breakin. If you check out commit 5da273fe3fd1 and look at
    drivers/block/nvme.c, you'll see a driver that's about 2000 lines.

    \
     
     \ /
      Last update: 2021-07-23 03:19    [W:4.587 / U:0.372 seconds]
    ©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site