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rcu/kvfree: Refactor kvfree_rcu_queue_batch()

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BugLink: https://bugs.launchpad.net/bugs/2099996

commit 3c5d61ae919cc377c71118ccc76fa6e8518023f8 upstream.

Improve readability of kvfree_rcu_queue_batch() function
in away that, after a first batch queuing, the loop is break
and success value is returned to a caller.

There is no reason to loop and check batches further as all
outstanding objects have already been picked and attached to
a certain batch to complete an offloading.

Fixes: 2b55d6a42d14 ("rcu/kvfree: Add kvfree_rcu_barrier() API")
Suggested-by: Linus Torvalds <torvalds@linux-foundation.org>
Closes: https://lore.kernel.org/lkml/ZvWUt2oyXRsvJRNc@pc636/T/
Signed-off-by: Uladzislau Rezki (Sony) <urezki@gmail.com>
Signed-off-by: Vlastimil Babka <vbabka@suse.cz>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Signed-off-by: Koichiro Den <koichiro.den@canonical.com>
Signed-off-by: Stefan Bader <stefan.bader@canonical.com>
This commit is contained in:
Uladzislau Rezki (Sony)
2025-02-25 22:59:22 +09:00
committed by Stefan Bader
parent 98dd89f875
commit 04e984ba78
1 changed files with 5 additions and 4 deletions
Download Patch File Download Diff File Expand all files Collapse all files
kernel/rcu/tree.c
+5 -4
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@@ -3253,11 +3253,12 @@ kvfree_rcu_queue_batch(struct kfree_rcu_cpu *krcp)
}
// One work is per one batch, so there are three
// "free channels", the batch can handle. It can
// be that the work is in the pending state when
// channels have been detached following by each
// other.
// "free channels", the batch can handle. Break
// the loop since it is done with this CPU thus
// queuing an RCU work is _always_ success here.
queued = queue_rcu_work(system_wq, &krwp->rcu_work);
WARN_ON_ONCE(!queued);
break;
}
}