svn commit: r289279 - in head/sys: kern vm

[Adrian Chadd]

HI,

FYI - this patch did fix my initial issue, but further work in
multi-user mode caused it to still hang. I haven't diagnosed it yet; I
just put back the yield call so bufdaemon could run.

So yeah, we still have some work to do. It hit the same problem; stuck
in a loop calling the path to wakeup bufdaemon, but then not sleeping
on anything.



-adrian


On 2 November 2015 at 14:13, Adrian Chadd <adrian.chadd at gmail.com> wrote:
> Hi Tijl, and others;
>
> Here's something that Jeff came up with that fixes my problem:
>
> adrian at victoria:~/work/freebsd/head-embedded/src % svn diff sys/kern/
> Index: sys/kern/vfs_bio.c
> ===================================================================
> --- sys/kern/vfs_bio.c  (revision 290048)
> +++ sys/kern/vfs_bio.c  (working copy)
> @@ -2910,7 +2910,7 @@
>         } while(buf_scan(false) == 0);
>
>         if (reserved)
> -               bufspace_release(maxsize);
> +               atomic_subtract_long(&bufspace, maxsize);
>         if (bp != NULL) {
>                 bp->b_flags |= B_INVAL;
>                 brelse(bp);
>
>
> Would you/others please try this and see if it improves things? It
> improves things for me on these memory-starved MIPS boards.
>
>
>
> -a