There are 2 problems with using bi_phys_segments as a counter
1/ we only use 16bits, which limits bios to 256M
2/ it is poor form to reuse a field like this. It interferes
with other changes to bios.
We need to clean up a few things before we can change the use the
counter which is now available inside a bio.
I have only tested this lightly. More review and testing would be
appreciated.
NeilBrown
---
NeilBrown (5):
md: optimize md_write_start() slightly.
md/raid5: use md_write_start to count stripes, not bios
md/raid5: simplfy delaying of writes while metadata is updated.
md/raid5: call bio_endio() directly rather than queuing for later.
md/raid5: use bio_inc_remaining() instead of repurposing bi_phys_segments as a counter
drivers/md/md.c | 32 ++++++------
drivers/md/raid5.c | 136 +++++++++++-----------------------------------------
drivers/md/raid5.h | 4 --
3 files changed, 44 insertions(+), 128 deletions(-)
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