On 6/6/19 11:44 AM, Jason Gunthorpe wrote:
From: Jason Gunthorpe
As coded this function can false-fail in various racy situations. Make it
reliable by running only under the write side of the mmap_sem and avoiding
the false-failing compare/exchange pattern.
Also make the locking very easy to
On Thu, Jun 06, 2019 at 03:44:31PM -0300, Jason Gunthorpe wrote:
> From: Jason Gunthorpe
>
> As coded this function can false-fail in various racy situations. Make it
> reliable by running only under the write side of the mmap_sem and avoiding
> the false-failing compare/exchange pattern.
>
>
From: Jason Gunthorpe
As coded this function can false-fail in various racy situations. Make it
reliable by running only under the write side of the mmap_sem and avoiding
the false-failing compare/exchange pattern.
Also make the locking very easy to understand by only ever reading or
writing
On 6/6/19 11:44 AM, Jason Gunthorpe wrote:
> From: Jason Gunthorpe
>
> As coded this function can false-fail in various racy situations. Make it
> reliable by running only under the write side of the mmap_sem and avoiding
> the false-failing compare/exchange pattern.
>
> Also make the locking
