lkml.org 
[lkml]   [2003]   [Dec]   [22]   [last100]   RSS Feed
Views: [more markup]  [less markup]  [headers]  [forward] 
 
Messages in this thread
Patch in this message
/
Subject[PATCH] Another dm and bio problem with 2.6.0
FromMark Haverkamp <>
DateMon, 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/

\
 
 \ /
  Last update: 2005-03-22 12:59    [from the cache]
©2003-2008