From: Andrew Morton <akpm@linux-foundation.org>
To: sunran001@208suo.com
Cc: dennis@kernel.org, tj@kernel.org, cl@linux.com,
linux-mm@kvack.org, linux-kernel@vger.kernel.org
Subject: Re: [PATCH] mm/percpu.c: change GFP_KERNEL to GFP_ATOMIC
Date: Tue, 18 Jul 2023 10:17:35 -0700 [thread overview]
Message-ID: <20230718101735.aa31791899e2f9e19e8e0a75@linux-foundation.org> (raw)
In-Reply-To: <7aa3a1cee63518cb13906d11ea130c9c@208suo.com>
On Tue, 18 Jul 2023 14:35:11 +0800 sunran001@208suo.com wrote:
> ERROR: function pcpu_balance_populated called on line 2238 inside lock
> on line 2234 but uses GFP_KERNEL
>
> Generated by: scripts/coccinelle/locks/call_kern.cocci
>
> ...
>
> --- a/mm/percpu.c
> +++ b/mm/percpu.c
> @@ -2033,7 +2033,7 @@ static void pcpu_balance_free(bool empty_only)
> static void pcpu_balance_populated(void)
> {
> /* gfp flags passed to underlying allocators */
> - const gfp_t gfp = GFP_KERNEL | __GFP_NORETRY | __GFP_NOWARN;
> + const gfp_t gfp = GFP_ATOMIC | __GFP_NORETRY | __GFP_NOWARN;
> struct pcpu_chunk *chunk;
> int slot, nr_to_pop, ret;
I don't believe this warning is correct.
spin_unlock_irq(&pcpu_lock);
ret = pcpu_populate_chunk(chunk, rs, rs + nr, gfp);
cond_resched();
spin_lock_irq(&pcpu_lock);
next prev parent reply other threads:[~2023-07-18 17:17 UTC|newest]
Thread overview: 3+ messages / expand[flat|nested] mbox.gz Atom feed top
[not found] <20230718063328.16140-1-xujianghui@cdjrlc.com>
2023-07-18 6:35 ` [PATCH] mm/percpu.c: change GFP_KERNEL to GFP_ATOMIC sunran001
2023-07-18 17:17 ` Andrew Morton [this message]
2023-07-20 23:43 ` Baoquan He
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