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| author | Colin Cross <ccross@android.com> | 2013-05-06 23:50:21 +0000 |
|---|---|---|
| committer | Rafael J. Wysocki <rafael.j.wysocki@intel.com> | 2013-05-12 14:16:23 +0200 |
| commit | 2b15af6f953012aac49984ead3f8ec744d941540 (patch) | |
| tree | 385fa2cf0c69634c55e1753fe77138021fc6f396 /net/unix | |
| parent | a2d5f1f5d941593e61071dc78e9de228eda5475f (diff) | |
| download | linux-stable-2b15af6f953012aac49984ead3f8ec744d941540.tar.gz linux-stable-2b15af6f953012aac49984ead3f8ec744d941540.tar.bz2 linux-stable-2b15af6f953012aac49984ead3f8ec744d941540.zip | |
af_unix: use freezable blocking calls in read
Avoid waking up every thread sleeping in read call on an AF_UNIX
socket during suspend and resume by calling a freezable blocking
call. Previous patches modified the freezer to avoid sending
wakeups to threads that are blocked in freezable blocking calls.
This call was selected to be converted to a freezable call because
it doesn't hold any locks or release any resources when interrupted
that might be needed by another freezing task or a kernel driver
during suspend, and is a common site where idle userspace tasks are
blocked.
Acked-by: Tejun Heo <tj@kernel.org>
Signed-off-by: Colin Cross <ccross@android.com>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
Diffstat (limited to 'net/unix')
| -rw-r--r-- | net/unix/af_unix.c | 3 |
1 files changed, 2 insertions, 1 deletions
diff --git a/net/unix/af_unix.c b/net/unix/af_unix.c index 826e09938bff..c4ce243824bb 100644 --- a/net/unix/af_unix.c +++ b/net/unix/af_unix.c @@ -114,6 +114,7 @@ #include <linux/mount.h> #include <net/checksum.h> #include <linux/security.h> +#include <linux/freezer.h> struct hlist_head unix_socket_table[2 * UNIX_HASH_SIZE]; EXPORT_SYMBOL_GPL(unix_socket_table); @@ -1879,7 +1880,7 @@ static long unix_stream_data_wait(struct sock *sk, long timeo, set_bit(SOCK_ASYNC_WAITDATA, &sk->sk_socket->flags); unix_state_unlock(sk); - timeo = schedule_timeout(timeo); + timeo = freezable_schedule_timeout(timeo); unix_state_lock(sk); clear_bit(SOCK_ASYNC_WAITDATA, &sk->sk_socket->flags); } |