[PATCH] Another dm and bio problem with 2.6.0

From: Mark Haverkamp (markh_at_osdl.org)
Date: 12/22/03

  • Next message: Randy.Dunlap: "Re: 2.6.0 incorrect memory sizing (without a full BIOS).." 
    To: linux-kernel <linux-kernel@vger.kernel.org>
Date:	Mon, 22 Dec 2003 09:42:37 -0800

    This fixes a problem similar to the patch I submitted on 11/20

    http://marc.theaimsgroup.com/?l=linux-kernel&m=106936439707962&w=2

    In this case, though, the result is an:

    "Incorrect number of segments after building list" message.

    The macro __BVEC_START assumes a bi_idx of zero when the dm code can
    submit a bio with a non-zero bi_idx.
    The code has been tested on an 8 way / 8gb OSDL STP machine with a 197G
    lvm volume running dbt2 test.

    ===== include/linux/bio.h 1.34 vs edited =====
    --- 1.34/include/linux/bio.h Sun Sep 21 14:50:33 2003
    +++ edited/include/linux/bio.h Wed Dec 17 07:17:53 2003
    @@ -162,7 +162,7 @@
      */
     
     #define __BVEC_END(bio) bio_iovec_idx((bio), (bio)->bi_vcnt - 1)
    -#define __BVEC_START(bio) bio_iovec_idx((bio), 0)
    +#define __BVEC_START(bio) bio_iovec_idx((bio), (bio)->bi_idx)
     #define BIOVEC_PHYS_MERGEABLE(vec1, vec2) \
             ((bvec_to_phys((vec1)) + (vec1)->bv_len) == bvec_to_phys((vec2)))
     #define BIOVEC_VIRT_MERGEABLE(vec1, vec2) \
      

    -- 
Mark Haverkamp <markh@osdl.org>
-
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/
  • Next message: Randy.Dunlap: "Re: 2.6.0 incorrect memory sizing (without a full BIOS).."

    Relevant Pages