These two patches are updated versions of the last two patches of this
series. They include the use of congestion to avoid excessive
waiting.
(I'm not resenting 1/4 and 2/4, they are unchanged).
Without the congestion check, I've seen wait times in
try_to_free_pages as long as 208 seconds.
With no waiting at all in nfs_release_page() I've seen wait times as long
as 1.4 seconds.
With the 1 second wait, I've seen 2 seconds.
These numbers will vary based on numerous factors, but it does seem
to suggest that 1 second is a good ball-park number.
NeilBrown
---
NeilBrown (2):
NFS: avoid deadlocks with loop-back mounted NFS filesystems.
NFS/SUNRPC: Remove other deadlock-avoidance mechanisms in nfs_release_page()
fs/nfs/file.c | 28 ++++++++++++++++++----------
fs/nfs/write.c | 7 +++++++
net/sunrpc/sched.c | 2 --
net/sunrpc/xprtrdma/transport.c | 2 --
net/sunrpc/xprtsock.c | 10 ----------
5 files changed, 25 insertions(+), 24 deletions(-)
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