linux-kernel - [PATCH v4 0/2] nfs/sunrpc: allow freezing of tasks with NFS calls in flight

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Message-Id: <1322570215-8570-1-git-send-email-jlayton@redhat.com>
Date:	Tue, 29 Nov 2011 07:36:53 -0500
From:	Jeff Layton <jlayton@...hat.com>
To:	rjw@...k.pl
Cc:	linux-kernel@...r.kernel.org, linux-nfs@...r.kernel.org,
	linux-pm@...r.kernel.org, tj@...nel.org, john@...va.com,
	trond.myklebust@...app.com, marek.belisko@...il.com,
	awilliam@...hat.com
Subject: [PATCH v4 0/2] nfs/sunrpc: allow freezing of tasks with NFS calls in flight

This patchset is the fourth attempt at fixing the issues with suspending
a machine that has an active NFS mount.

The bug reported against Fedora is here:

    https://bugzilla.redhat.com/show_bug.cgi?id=717735

The main difference from v3 is that I've fixed a stupid set of errors in
freezable_schedule_timeout_killable. The if condition was reversed from
what it should have been, and the code did not call freezer_count()
again when it was going to return early.

Tejun has mentioned that the extra try_to_freeze() calls are unnecessary
on top of the pm-freezer changes, but this set should work on as
expected on top of 3.2-ish kernels. In the meantime, I'll look over the
pm-freezer changes and see whether I need to make changes in this set
for 3.3.

Jeff Layton (2):
  sunrpc: make rpc_wait_bit_killable handle freeze events
  nfs: make TASK_KILLABLE sleeps attempt to freeze

 fs/nfs/inode.c          |    3 ++-
 fs/nfs/nfs3proc.c       |    3 ++-
 fs/nfs/nfs4proc.c       |    5 +++--
 fs/nfs/proc.c           |    3 ++-
 include/linux/freezer.h |   42 ++++++++++++++++++++++++++++++++++++++++++
 net/sunrpc/sched.c      |    3 ++-
 6 files changed, 53 insertions(+), 6 deletions(-)

-- 
1.7.6.4

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