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Freezer / sunrpc / NFS: don't allow TASK_KILLABLE sleeps to block the freezer

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Allow the freezer to skip wait_on_bit_killable sleeps in the sunrpc
layer. This should allow suspend and hibernate events to proceed, even
when there are RPC's pending on the wire.

Also, wrap the TASK_KILLABLE sleeps in NFS layer in freezer_do_not_count
and freezer_count calls. This allows the freezer to skip tasks that are
sleeping while looping on EJUKEBOX or NFS4ERR_DELAY sorts of errors.

Signed-off-by: Jeff Layton <[email protected]>
Signed-off-by: Rafael J. Wysocki <[email protected]>
This commit is contained in:
Jeff Layton 2011-12-01 22:44:39 +01:00 • committed by Rafael J. Wysocki
commit d310310cbf
6 changed files with 39 additions and 6 deletions
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3
net/sunrpc/sched.c
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@ -18,6 +18,7 @@
#include <linux/smp.h>
#include <linux/spinlock.h>
#include <linux/mutex.h>
#include <linux/freezer.h>
#include <linux/sunrpc/clnt.h>
@ -231,7 +232,7 @@ static int rpc_wait_bit_killable(void *word)
{
if (fatal_signal_pending(current))
return -ERESTARTSYS;
schedule();
freezable_schedule();
return 0;
}