linux-kernel - Re: [PATCH v1] mm: zswap: Fix a potential memory leak in zswap

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Message-ID: <20241114051149.GC1564047@cmpxchg.org>
Date: Thu, 14 Nov 2024 00:11:49 -0500
From: Johannes Weiner <hannes@...xchg.org>
To: "Sridhar, Kanchana P" <kanchana.p.sridhar@...el.com>
Cc: Nhat Pham <nphamcs@...il.com>, Yosry Ahmed <yosryahmed@...gle.com>,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
	"linux-mm@...ck.org" <linux-mm@...ck.org>,
	"chengming.zhou@...ux.dev" <chengming.zhou@...ux.dev>,
	"usamaarif642@...il.com" <usamaarif642@...il.com>,
	"ryan.roberts@....com" <ryan.roberts@....com>,
	"Huang, Ying" <ying.huang@...el.com>,
	"21cnbao@...il.com" <21cnbao@...il.com>,
	"akpm@...ux-foundation.org" <akpm@...ux-foundation.org>,
	"Feghali, Wajdi K" <wajdi.k.feghali@...el.com>,
	"Gopal, Vinodh" <vinodh.gopal@...el.com>
Subject: Re: [PATCH v1] mm: zswap: Fix a potential memory leak in
 zswap_decompress().

On Thu, Nov 14, 2024 at 01:56:16AM +0000, Sridhar, Kanchana P wrote:
> So my question was, can we prevent the migration to a different cpu
> by relinquishing the mutex lock after this conditional

Holding the mutex doesn't prevent preemption/migration.