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| author |   Gerald Schaefer <gerald.schaefer@de.ibm.com> | 2014-03-31 16:18:29 +0200 |
|---|---|---|
| committer |   Martin Schwidefsky <schwidefsky@de.ibm.com> | 2014-04-01 13:25:26 +0200 |
| commit | 9f0128f9e7bf7b2929540d395daf8d823dc30c9f (patch) | |
| tree | 524b297e3594e473482871c4b2bf3946d6d32ade /drivers/s390/char/sclp.h | |
| parent | kvm/s390: also set guest pages back to stable on kexec/kdump (diff) | |
| download | linux-dev-9f0128f9e7bf7b2929540d395daf8d823dc30c9f.tar.xz linux-dev-9f0128f9e7bf7b2929540d395daf8d823dc30c9f.zip | |
s390/sclp: add timeout for queued requests
This patch adds a timeout option for queued requests and introduces
sclp_sync_request_timeout() to use this timer. With this, blocking the
system too long, e.g. during an SE reboot, can be avoided in critical
situations like CPU and memory hotplug.
Since there is no way to cancel a running request, this timeout only
applies to queued requests that have not yet been started.
Reviewed-by: Peter Oberparleiter <oberpar@linux.vnet.ibm.com>
Signed-off-by: Gerald Schaefer <gerald.schaefer@de.ibm.com>
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
Diffstat (limited to 'drivers/s390/char/sclp.h')
| -rw-r--r-- | drivers/s390/char/sclp.h | 9 |
1 files changed, 9 insertions, 0 deletions
diff --git a/drivers/s390/char/sclp.h b/drivers/s390/char/sclp.h index fea76aed9eea..a68b5ec7d042 100644 --- a/drivers/s390/char/sclp.h +++ b/drivers/s390/char/sclp.h @@ -133,6 +133,11 @@ struct sclp_req { /* Callback that is called after reaching final status. */ void (*callback)(struct sclp_req *, void *data); void *callback_data; + int queue_timeout; /* request queue timeout (sec), set by + caller of sclp_add_request(), if + needed */ + /* Internal fields */ + unsigned long queue_expires; /* request queue timeout (jiffies) */ }; #define SCLP_REQ_FILLED 0x00 /* request is ready to be processed */ @@ -140,6 +145,9 @@ struct sclp_req { #define SCLP_REQ_RUNNING 0x02 /* request is currently running */ #define SCLP_REQ_DONE 0x03 /* request is completed successfully */ #define SCLP_REQ_FAILED 0x05 /* request is finally failed */ +#define SCLP_REQ_QUEUED_TIMEOUT 0x06 /* request on queue timed out */ + +#define SCLP_QUEUE_INTERVAL 5 /* timeout interval for request queue */ /* function pointers that a high level driver has to use for registration */ /* of some routines it wants to be called from the low level driver */ @@ -173,6 +181,7 @@ int sclp_deactivate(void); int sclp_reactivate(void); int sclp_service_call(sclp_cmdw_t command, void *sccb); int sclp_sync_request(sclp_cmdw_t command, void *sccb); +int sclp_sync_request_timeout(sclp_cmdw_t command, void *sccb, int timeout); int sclp_sdias_init(void); void sclp_sdias_exit(void); |