Messages in this thread |  | | | From | Badari Pulavarty <> | | Subject | Re: [PATCH] Mostly PAGE_SIZE IO for RAW (FINAL VERSION) | | Date | Tue, 15 Jan 2002 17:12:29 -0800 (PST) |
| |
> > On Mon, 14 Jan 2002, Badari Pulavarty wrote: > > > > > Here is the final version of the patch for doing mostly 4K size IO > > for RAW. (2.4.17). In this version, I incorporate all the code > > review comments from Andrea. Thanks to Andrea. > > > > Marcelo, would you please consider this patch for 2.4.18-pre4 ? > > Please let me know, if you want me to make the patch for 2.4.18-pre3. > > I want to make sure the drivers able to do 4K IO really can do that with > reliability. > > I think we can test that on -ac kernels. > >
Marcelo,
The issue here is not whether drivers can do 4K IO relaibly. If you go thro filesystem, they are doing I/Os in 4K chunks. Infact, the I/Os get coalsed into bigger size (64K etc).
The issue here is, whether drivers can handle buffer heads with multiple sizes (b_size) in a single IO (coalsed) request. Inorder to address this concern, I limited my patch to work only with few tested SCSI drivers for now. So I think, I already addressed 'safety' issue with untested drivers.
But if you want to get some testing thro -ac kernels, I will be happy to go that route. I already sent a version to Alan for consideration to next -ac kernel.
Regards, Badari
- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
|  |