nfs: page group syncing in read path

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Operations that modify state for a whole page must be syncronized across
all requests within a page group. In the read path, this is calling
unlock_page and SetPageUptodate. Both of these functions should not be
called until all requests in a page group have reached the point where
they would call them.

This patch should have no effect yet since all page groups currently
have one request, but will come into play when pg_test functions are
modified to split pages into sub-page regions.

Signed-off-by: Weston Andros Adamson <dros@primarydata.com>
Signed-off-by: Trond Myklebust <trond.myklebust@primarydata.com>

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Weston Andros Adamson 2014-05-15 11:56:46 -04:00 • committed by Trond Myklebust

parent 2bfc6e566d

commit 67d0338edd

3 changed files with 21 additions and 5 deletions

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2

fs/nfs/pagelist.c

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22

fs/nfs/read.c

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2

include/linux/nfs_page.h

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