From: Heiko Carstens <hca@linux.ibm.com>
To: Alexander Gordeev <agordeev@linux.ibm.com>,
Sven Schnelle <svens@linux.ibm.com>,
Vasily Gorbik <gor@linux.ibm.com>,
Christian Borntraeger <borntraeger@linux.ibm.com>,
Harald Freudenberger <freude@linux.ibm.com>,
Holger Dengler <dengler@linux.ibm.com>,
Vineeth Vijayan <vneethv@linux.ibm.com>,
Peter Oberparleiter <oberpar@linux.ibm.com>,
Janosch Frank <frankja@linux.ibm.com>,
Claudio Imbrenda <imbrenda@linux.ibm.com>,
David Hildenbrand <david@kernel.org>,
Peter Zijlstra <peterz@infradead.org>
Cc: linux-s390@vger.kernel.org, linux-kernel@vger.kernel.org
Subject: [PATCH 4/4] s390/cio: Remove cond_resched() calls
Date: Mon, 27 Jul 2026 18:24:30 +0200 [thread overview]
Message-ID: <20260727162430.1599396-5-hca@linux.ibm.com> (raw)
In-Reply-To: <20260727162430.1599396-1-hca@linux.ibm.com>
Since [1] cond_resched() is a no-op on s390. Remove all calls.
[1] commit 7dadeaa6e851 ("sched: Further restrict the preemption modes")
Signed-off-by: Heiko Carstens <hca@linux.ibm.com>
---
drivers/s390/cio/css.c | 8 --------
1 file changed, 8 deletions(-)
diff --git a/drivers/s390/cio/css.c b/drivers/s390/cio/css.c
index e5a0ec6b4e3e..54b8b8639694 100644
--- a/drivers/s390/cio/css.c
+++ b/drivers/s390/cio/css.c
@@ -618,11 +618,6 @@ static int slow_eval_known_fn(struct subchannel *sch, void *data)
rc = css_evaluate_known_subchannel(sch, 1);
if (rc == -EAGAIN)
css_schedule_eval(sch->schid);
- /*
- * The loop might take long time for platforms with lots of
- * known devices. Allow scheduling here.
- */
- cond_resched();
}
return 0;
}
@@ -654,9 +649,6 @@ static int slow_eval_unknown_fn(struct subchannel_id schid, void *data)
default:
rc = 0;
}
- /* Allow scheduling here since the containing loop might
- * take a while. */
- cond_resched();
}
return rc;
}
--
2.53.0
prev parent reply other threads:[~2026-07-27 16:47 UTC|newest]
Thread overview: 5+ messages / expand[flat|nested] mbox.gz Atom feed top
2026-07-27 16:24 [PATCH 0/4] s390: Remove or replace cond_resched() calls Heiko Carstens
2026-07-27 16:24 ` [PATCH 1/4] s390/crypto: Replace cond_resched() with schedule() Heiko Carstens
2026-07-27 16:24 ` [PATCH 2/4] KVM: s390: Remove cond_resched() calls Heiko Carstens
2026-07-27 16:24 ` [PATCH 3/4] " Heiko Carstens
2026-07-27 16:24 ` Heiko Carstens [this message]
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