Matthew Dillon <[EMAIL PROTECTED]> wrote:
>
> :
> :Hi,
> :
> :Sorry to unwantedly butt in, but the patch supplied by Seigo actually
> :solved the vm_map.c locking problems which used to come up on my system.
> :Just some info. :)
> :
> :Regards,
> :
> : -- Hiten Pandya
> : -- <[EMAIL PROTECTED]>
>
> It fixed some things, it broke some things. Pretty much standard
> fare for anyone who has ever done work on the vm_map lock, including
> yours truely. John Dyson couldn't get it right, David Greenman couldn't
> get it right, I couldn't get it completely right... getting it to do
> the right thing even under -stable is difficult, which is why I am
> suggesting that it simply be made into an exclusive lock in -current.
In addition to the fact it doesn't actually serialize the general
modification of the vm_map {} structure itself, just certain kinds of
changes, so is easily a primary reason that the VM system as it stands now
is inherently single-threaded.
--
Brian Fundakowski Feldman \'[ FreeBSD ]''''''''''\
<> [EMAIL PROTECTED] <> [EMAIL PROTECTED] \ The Power to Serve! \
Opinions expressed are my own. \,,,,,,,,,,,,,,,,,,,,,,\
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