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(parent: fd2f3a0) | patch
nfs: fix nonblocking calls to nfs_page_group_lock
authorWeston Andros Adamson <dros@primarydata.com>
Fri, 8 Aug 2014 15:00:54 +0000 (11:00 -0400)
committerTrond Myklebust <trond.myklebust@primarydata.com>
Fri, 22 Aug 2014 22:04:42 +0000 (18:04 -0400)
commitbc8a309e88a86205fc3e17f06e42a2e56fc6f807
tree3a3df69f6e7a6e16fc6a816e2e4ee1d0544ec8cbtree | snapshot
parentfd2f3a06d30c85a17cf035ebc60c88c2a13a8ececommit | diff
nfs: fix nonblocking calls to nfs_page_group_lock

nfs_page_group_lock was calling wait_on_bit_lock even when told not to
block. Fix by first trying test_and_set_bit, followed by wait_on_bit_lock
if and only if blocking is allowed.  Return -EAGAIN if nonblocking and the
test_and_set of the bit was already locked.

Signed-off-by: Weston Andros Adamson <dros@primarydata.com>
Reviewed-by: Peng Tao <tao.peng@primarydata.com>
Signed-off-by: Trond Myklebust <trond.myklebust@primarydata.com>
fs/nfs/pagelist.c diff | blob | history
Domain: System / Kernel;