From: Pratyush Yadav <pratyush@kernel.org>
To: Pasha Tatashin <pasha.tatashin@soleen.com>
Cc: rppt@kernel.org, akpm@linux-foundation.org, linux-mm@kvack.org,
linux-kernel@vger.kernel.org, dmatlack@google.com,
pratyush@kernel.org, skhawaja@google.com
Subject: Re: [PATCH v3 04/10] liveupdate: Protect FLB lists with luo_register_rwlock
Date: Tue, 31 Mar 2026 19:33:33 +0000 [thread overview]
Message-ID: <2vxzse9fhjzm.fsf@kernel.org> (raw)
In-Reply-To: <20260327033335.696621-5-pasha.tatashin@soleen.com> (Pasha Tatashin's message of "Fri, 27 Mar 2026 03:33:28 +0000")
On Fri, Mar 27 2026, Pasha Tatashin wrote:
> Because liveupdate FLB objects will soon drop their persistent module
> references when registered, list traversals must be protected against
> concurrent module unloading.
>
> To provide this protection, utilize the global luo_register_rwlock.
> It protects the global registry of FLBs and the handler's specific
> list of FLB dependencies.
>
> Read locks are used during concurrent list traversals (e.g., during
> preservation and serialization). Write locks are taken during registration
> and unregistration.
>
> Signed-off-by: Pasha Tatashin <pasha.tatashin@soleen.com>
Reviewed-by: Pratyush Yadav (Google) <pratyush@kernel.org>
[...]
--
Regards,
Pratyush Yadav
next prev parent reply other threads:[~2026-03-31 19:33 UTC|newest]
Thread overview: 36+ messages / expand[flat|nested] mbox.gz Atom feed top
2026-03-27 3:33 [PATCH v3 00/10] liveupdate: Fix module unloading and unregister API Pasha Tatashin
2026-03-27 3:33 ` [PATCH v3 01/10] liveupdate: Safely print untrusted strings Pasha Tatashin
2026-03-27 13:16 ` Pasha Tatashin
2026-03-31 9:40 ` Pratyush Yadav
2026-04-13 16:43 ` Pasha Tatashin
2026-03-31 9:50 ` Pratyush Yadav
2026-03-31 16:35 ` Pasha Tatashin
2026-03-27 3:33 ` [PATCH v3 02/10] liveupdate: Synchronize lazy initialization of FLB private state Pasha Tatashin
2026-03-31 10:38 ` Pratyush Yadav
2026-03-31 16:41 ` Pasha Tatashin
2026-03-31 19:22 ` Pratyush Yadav
2026-03-31 19:38 ` Pasha Tatashin
2026-03-27 3:33 ` [PATCH v3 03/10] liveupdate: Protect file handler list with rwsem Pasha Tatashin
2026-03-30 16:48 ` Samiullah Khawaja
2026-03-30 19:32 ` Pasha Tatashin
2026-03-31 19:24 ` Pratyush Yadav
2026-03-27 3:33 ` [PATCH v3 04/10] liveupdate: Protect FLB lists with luo_register_rwlock Pasha Tatashin
2026-03-31 19:33 ` Pratyush Yadav [this message]
2026-03-27 3:33 ` [PATCH v3 05/10] liveupdate: Defer FLB module refcounting to active sessions Pasha Tatashin
2026-03-30 16:56 ` Samiullah Khawaja
2026-03-30 19:28 ` Pasha Tatashin
2026-04-02 16:21 ` Pratyush Yadav
2026-03-27 3:33 ` [PATCH v3 06/10] liveupdate: Remove luo_session_quiesce() Pasha Tatashin
2026-04-02 16:27 ` Pratyush Yadav
2026-03-27 3:33 ` [PATCH v3 07/10] liveupdate: Auto unregister FLBs on file handler unregistration Pasha Tatashin
2026-04-03 10:17 ` Pratyush Yadav
2026-04-13 18:06 ` Pasha Tatashin
2026-03-27 3:33 ` [PATCH v3 08/10] liveupdate: Remove liveupdate_test_unregister() Pasha Tatashin
2026-04-03 10:20 ` Pratyush Yadav
2026-03-27 3:33 ` [PATCH v3 09/10] liveupdate: Make unregister functions return void Pasha Tatashin
2026-03-27 14:41 ` Pasha Tatashin
2026-04-03 10:41 ` Pratyush Yadav
2026-03-27 3:33 ` [PATCH v3 10/10] liveupdate: Defer file handler module refcounting to active sessions Pasha Tatashin
2026-03-27 17:14 ` Andrew Morton
2026-04-03 10:42 ` Pratyush Yadav
2026-03-27 17:24 ` [PATCH v3 00/10] liveupdate: Fix module unloading and unregister API Andrew Morton
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