Messages in this thread | | | Date | Tue, 22 Apr 2008 23:03:18 +0900 (JST) | Subject | Re: [RFC][PATCH 0/10] I/O context inheritance | From | Hirokazu Takahashi <> |
| |
Hi,
Sorry, these patches are for linux-2.6.25.
> This series of patches make the block I/O layer and the I/O schedulers > be able to determine the right io_context of every I/O. > > The current implementation of the block I/O layer and the I/O schedulers > assume that the current process is the one which issued the given I/O, > then use the io_context of this process to control the I/O. > But this assumption isn't quite right because several kernel threads > will handle I/O requests on behalf of the processes which originated them. > This often happens when you want to use device mapper modules. > > The patches make every bio has a pointer to an io_context, which will > be set when it is allocated or cloned. So it makes it possible to find > the right io_context from any bio at any place. > > I'm waiting for your comments. > > Thank you, > Hirokazu Takahashi.
| |