Re: [RFC PATCH v2 3/3] block: Use iov_iter_extract_pages() and page pinning in direct-io.c

[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]

 



On Thu, May 25, 2023 at 11:39:53PM +0100, David Howells wrote:
> Change the old block-based direct-I/O code to use iov_iter_extract_pages()
> to pin user pages or leave kernel pages unpinned rather than taking refs
> when submitting bios.
> 
> This makes use of the preceding patches to not take pins on the zero page
> (thereby allowing insertion of zero pages in with pinned pages) and to get
> additional pins on pages, allowing an extracted page to be used in multiple
> bios without having to re-extract it.

I'm not seeing where we skip the unpin of the zero page, as commented
in patch 1 (but maybe I'm not reviewing carefully enough as I'm at a
conference right now).

Otherwise my only rather cosmetic comment right now is that I'd called
the "need_unpin" member is_pinned.





[Index of Archives]     [Linux ARM Kernel]     [Linux ARM]     [Linux Omap]     [Fedora ARM]     [IETF Annouce]     [Bugtraq]     [Linux OMAP]     [Linux MIPS]     [eCos]     [Asterisk Internet PBX]     [Linux API]

  Powered by Linux