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SubjectRe: [PATCH 13/17] staging: lustre: libcfs: remove cfs_timeout_cap()
On Mon, Apr 02 2018, Dilger, Andreas wrote:

> On Mar 28, 2018, at 22:26, NeilBrown <neilb@suse.com> wrote:

>> diff --git a/drivers/staging/lustre/include/linux/libcfs/linux/linux-time.h b/drivers/staging/lustre/include/linux/libcfs/linux/linux-time.h
>> index ff3aae2f1231..ecb2126a9e6f 100644
>> --- a/drivers/staging/lustre/include/linux/libcfs/linux/linux-time.h
>> +++ b/drivers/staging/lustre/include/linux/libcfs/linux/linux-time.h
>> @@ -78,7 +78,7 @@ static inline int cfs_time_beforeq_64(u64 t1, u64 t2)
>> /*
>> * One jiffy
>> */
>> -#define CFS_TICK (1)
>> +#define CFS_TICK (1UL)
>
> It seems like CFS_TICK is mostly useless as well and could just be dropped?

Possibly, but I don't know what its purpose is so I didn't want to just
drop it in the middle of a patch that is performing an idempotent
transformation.

Do you know why the one place that uses CFS_TICK wants to protect about
a timeout of zero? Maybe because the old l_wait_event() treated a
timeout of zero as meaning no timeout?
In that case this really is irrelevant now and that
wait_event_idle_timeout() should just use "timeout" directly.

Thanks,
NeilBrown


>
>> #define CFS_DURATION_T "%ld"
>>
>> diff --git a/drivers/staging/lustre/lustre/ptlrpc/import.c b/drivers/staging/lustre/lustre/ptlrpc/import.c
>> index 4a9d1f189d01..dd4fd54128dd 100644
>> --- a/drivers/staging/lustre/lustre/ptlrpc/import.c
>> +++ b/drivers/staging/lustre/lustre/ptlrpc/import.c
>> @@ -1486,7 +1486,7 @@ int ptlrpc_disconnect_import(struct obd_import *imp, int noclose)
>> }
>>
>> if (ptlrpc_import_in_recovery(imp)) {
>> - long timeout;
>> + unsigned long timeout;
>>
>> if (AT_OFF) {
>> if (imp->imp_server_timeout)
>> @@ -1501,7 +1501,7 @@ int ptlrpc_disconnect_import(struct obd_import *imp, int noclose)
>>
>> if (wait_event_idle_timeout(imp->imp_recovery_waitq,
>> !ptlrpc_import_in_recovery(imp),
>> - cfs_timeout_cap(timeout)) == 0)
>> + max(timeout, CFS_TICK)) == 0)
>> l_wait_event_abortable(
>> imp->imp_recovery_waitq,
>> !ptlrpc_import_in_recovery(imp));
>>
>>
>
> Cheers, Andreas
> --
> Andreas Dilger
> Lustre Principal Architect
> Intel Corporation
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