Re: [Qemu-devel] [RFC v3 16/19] tcg: move locking for tb_invalidate_phys_page_range up

[Sergey Fedorov]

On 03/06/16 23:40, Alex Bennée wrote:
> While we previously assumed an existing memory lock protected the page
> look up in the MTTCG SoftMMU case the memory lock is provided by the
> tb_lock. As a result we push the taking of this lock up the call tree.
> This requires a slightly different entry for the SoftMMU and user-mode
> cases from tb_invalidate_phys_range.

Sorry, I can't understand the description for the patch :( Some
rewording might be helpful, if you don't mind.

Thanks,
Sergey

> This also means user-mode breakpoint insertion needs to take two locks
> but it hadn't taken any previously so this is an improvement.
>
> Signed-off-by: Alex Bennée <address@hidden>
> ---
>  exec.c          | 16 ++++++++++++++++
>  translate-all.c | 37 +++++++++++++++++++++++++++++--------
>  2 files changed, 45 insertions(+), 8 deletions(-)
(snip)