bio: add support for inlining a number of bio_vecs inside the bio

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When we go and allocate a bio for IO, we actually do two allocations.
One for the bio itself, and one for the bi_io_vec that holds the
actual pages we are interested in.

This feature inlines a definable amount of io vecs inside the bio
itself, so we eliminate the bio_vec array allocation for IO's up
to a certain size. It defaults to 4 vecs, which is typically 16k
of IO.

Signed-off-by: Jens Axboe <jens.axboe@oracle.com>

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This commit is contained in:

Jens Axboe 2008-12-23 12:42:54 +01:00

parent bb799ca020

commit 392ddc3298

2 changed files with 34 additions and 5 deletions

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27

fs/bio.c

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12

include/linux/bio.h

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