From: Matthew Wilcox <willy@infradead.org>
To: Zhongkun He <hezhongkun.hzk@bytedance.com>
Cc: akpm@linux-foundation.org, linux-mm@kvack.org,
linux-kernel@vger.kernel.org
Subject: Re: [PATCH] mm/z3fold: remove unneeded spinlock
Date: Sun, 4 Feb 2024 18:46:28 +0000 [thread overview]
Message-ID: <Zb_bhO8Z_d7VUCdJ@casper.infradead.org> (raw)
In-Reply-To: <20240204125404.2112384-1-hezhongkun.hzk@bytedance.com>
On Sun, Feb 04, 2024 at 08:54:04PM +0800, Zhongkun He wrote:
> There is no need to use spinlock in this section, so
> remove it.
I don't know this code at all, but the idiom is (relatively) common.
It waits until anybody _currently_ holding the lock has released it.
That would, eg, make it safe to free the 'pool' memory.
> - spin_lock(&pool->lock);
> - spin_unlock(&pool->lock);
next prev parent reply other threads:[~2024-02-04 18:46 UTC|newest]
Thread overview: 5+ messages / expand[flat|nested] mbox.gz Atom feed top
2024-02-04 12:54 Zhongkun He
2024-02-04 18:46 ` Matthew Wilcox [this message]
2024-02-05 1:08 ` [External] " Zhongkun He
2024-02-08 3:29 ` Johannes Weiner
2024-02-08 17:39 ` Zhongkun He
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