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b=USzvepqJlJ+ljNLIY8vRep4l2fDqacmIF98vHX7Pkhxjqg41V1wggCQ9ohOGr/jrK E5O+ceMCq3OHmTkuMhLovkklqVYeTx3QG/4qs/u416wd8KffAep3qlYekeKTttfM01 MICKk3wcrrv8eSQ8nhTjPd7I7Coxa9dj2X/+LvHVgUBUXlzqTah2oMjVaJl3bDiPBW xoYAGfSgi+bDmAWeE9RGJMI027dWjr+qULu8bRIwATp8G2gBzc23OLzIF5KcR1hp8z cD9Rn2hOMTuj583wTFKpwuKWVQL/o+n+rUGQ1D0qDYdLkECgcvLevW0b08XAmZsREH vZmphXEezHphA== Date: Wed, 15 Apr 2026 18:35:42 +0300 From: Mike Rapoport To: Pasha Tatashin Cc: 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 v4 10/11] liveupdate: Defer file handler module refcounting to active sessions Message-ID: References: <20260413185127.128180-1-pasha.tatashin@soleen.com> <20260413185127.128180-11-pasha.tatashin@soleen.com> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20260413185127.128180-11-pasha.tatashin@soleen.com> X-Stat-Signature: wjmtmy7fyzyro98a9mtik5pjaraa1f3c X-Rspamd-Queue-Id: 9C1E44000A X-Rspam-User: X-Rspamd-Server: rspam06 X-HE-Tag: 1776267349-866982 X-HE-Meta: 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 ArvxoGdP PIqJNtPl2Er47uEOHSMhZ6t17Kaq3i2CCvMQBeWyrQxx5aZqPvrne2pzx69UJgDEtJu5EkC9grXkyM/dWqXHrNsFtOe/6P1ZEESqfi37Ji5q6NEXUy+Nx1ulf1j2+WSBs5aWaXV1LOeHSjZ4GWxw4qeBgMzk4n7CSVCH98iZjdtYkagUnFLde8fHCIPAitEa3daLWSVhmGoAbdHTImIkOPXCjuG+6OrptoU3gFW33/j5jIW+mBnUUb8V4YoPssi0ls7c7uhAf+2C1juBIH09/g8MB5ugUZIZTCcUGO8QkkOmILjQ55tgEzE6EcY0p1AriBwUNWAuAyGUX4Egnt4kOKr0AEQ== Sender: owner-linux-mm@kvack.org Precedence: bulk X-Loop: owner-majordomo@kvack.org List-ID: List-Subscribe: List-Unsubscribe: On Mon, Apr 13, 2026 at 06:51:26PM +0000, Pasha Tatashin wrote: > Stop pinning modules indefinitely upon file handler registration. > Instead, dynamically increment the module reference count only when a > live update session actively uses the file handler (e.g., during > preservation or deserialization), and release it when the session ends. > > This allows modules providing live update handlers to be gracefully > unloaded when no live update is in progress. > > Signed-off-by: Pasha Tatashin > Reviewed-by: Pratyush Yadav (Google) Reviewed-by: Mike Rapoport (Microsoft) > --- > kernel/liveupdate/luo_file.c | 24 ++++++++++++------------ > 1 file changed, 12 insertions(+), 12 deletions(-) -- Sincerely yours, Mike.