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Tue, 01 Sep 2026 09:36:44 -0700 (PDT) From: Uladzislau Rezki X-Google-Original-From: Uladzislau Rezki Date: Tue, 1 Sep 2026 18:36:42 +0200 To: Andrew Morton Cc: Uladzislau Rezki , Dev Jain , Ye Liu , Ye Liu , linux-mm@kvack.org, linux-kernel@vger.kernel.org Subject: Re: [PATCH v2] mm: vmalloc: fix vmap_purge_lock livelock under memory pressure Message-ID: References: <20260828091753.299295-1-ye.liu@linux.dev> <20260828110503.e1eff32a9b7df9a8b2ddd4d6@linux-foundation.org> <20260831184252.15b978678820a94b106640ac@linux-foundation.org> Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20260831184252.15b978678820a94b106640ac@linux-foundation.org> On Mon, Aug 31, 2026 at 06:42:52PM -0700, Andrew Morton wrote: > On Mon, 31 Aug 2026 11:54:22 +0200 Uladzislau Rezki wrote: > > > But, i think we can overt mutex_lock() into mutex_trylock() just only > > in the: > > > > static unsigned long > > vmap_node_shrink_scan(struct shrinker *shrink, struct shrink_control *sc) > > { > > struct vmap_node *vn; > > > > guard(mutex)(&vmap_purge_lock); > > for_each_vmap_node(vn) > > decay_va_pool_node(vn, true); > > > > return SHRINK_STOP; > > } > > I *think* that means we can expect a v3. > > Ho hum. I guess I'll queue v2, under the assumption that my > assumptions are usually wrong. > Yep :) -- Uladzislau Rezki