Ok !! Making direct-io code use bio_add_page() is little tricky.
We operate on the same page multiple times to update the length of
the IO (in case of raw device). I will look at it closely.
> Current bitkeeper has
> #define BIO_MAX_PAGES (256)
> That's a megabyte. It works fine with mpage.c. But direct-io.c
> is still using BIO_MAX_PAGES. It really is building 1 megabyte
> BIOs, which will break just about every device out there.
> I think we just ask Linus to do the below until we get it fixed up?
> --- 2.5.38-bk2/fs/direct-io.c~direct-io-size Mon Sep 23 16:12:25 2002
> +++ 2.5.38-bk2-akpm/fs/direct-io.c Mon Sep 23 16:12:47 2002
> @@ -26,7 +26,7 @@
> * The largest-sized BIO which this code will assemble, in bytes. Set this
> * to PAGE_SIZE if your drivers are broken.
> -#define DIO_BIO_MAX_SIZE BIO_MAX_SIZE
> +#define DIO_BIO_MAX_SIZE (16*1024)
> * How many user pages to map in one call to get_user_pages(). This determines
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This archive was generated by hypermail 2b29 : Mon Sep 23 2002 - 22:00:41 EST