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Fri, 30 Jan 2026 14:32:05 -0800 (PST) MIME-Version: 1.0 References: <20251118051604.3868588-1-viro@zeniv.linux.org.uk> <2026012715-mantra-pope-9431@gregkh> <20260128045954.GS3183987@ZenIV> <20260129032335.GT3183987@ZenIV> <20260129225433.GU3183987@ZenIV> <20260130070424.GV3183987@ZenIV> In-Reply-To: <20260130070424.GV3183987@ZenIV> From: Samuel Wu Date: Fri, 30 Jan 2026 14:31:54 -0800 X-Gm-Features: AZwV_QjYrhpLENkXIfDxcZ9u-zvP7f57lE4mcVebqUxFVKgl6ULvCT7XG0RHQoc Message-ID: Subject: Re: [PATCH v4 00/54] tree-in-dcache stuff To: Al Viro Cc: Greg KH , linux-fsdevel@vger.kernel.org, torvalds@linux-foundation.org, brauner@kernel.org, jack@suse.cz, raven@themaw.net, miklos@szeredi.hu, neil@brown.name, a.hindborg@kernel.org, linux-mm@kvack.org, linux-efi@vger.kernel.org, ocfs2-devel@lists.linux.dev, kees@kernel.org, rostedt@goodmis.org, linux-usb@vger.kernel.org, paul@paul-moore.com, casey@schaufler-ca.com, linuxppc-dev@lists.ozlabs.org, john.johansen@canonical.com, selinux@vger.kernel.org, borntraeger@linux.ibm.com, bpf@vger.kernel.org, clm@meta.com, android-kernel-team Content-Type: text/plain; charset="UTF-8" Content-Transfer-Encoding: quoted-printable X-Rspamd-Server: rspam10 X-Rspamd-Queue-Id: B34974000F X-Stat-Signature: uf6xib185q4bbahbz13eqeijxuxjpqzc X-Rspam-User: X-HE-Tag: 1769812327-782165 X-HE-Meta: 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 1EMvpQB7 Wm1WxBFXuPNtBikqpYsvN5qTAuWpJtU8KfQSA+TPi1VlG6kwYW46I6NFMWEqMApCiit2JNOJt2EFYtRxv/pdM86+GigYredTxar6PY1RiyKXTojwNn4i89UTpUKWd1coi8gn7lk2uq80DqZ7Xw2jHQ36At8ZMnhhISRgTAph5QFKd3kp2IqNqJnn6AxZuD7LnNhci+BA0pUxHJ4UQUkhege4bhO4xc7WWYuz+fkO1nwieFDDkG7XRdZeeprqsEUqYgu/J/k7sGxp7fS10HyGo7y/Zemf18fWLBYYSVxJJfV+ByPFvIhulHlQryo/XrTZvatpYARdps/Q9bEYhPIlWuqDkQSZN9bPj/6w3Afu/8478nIuaXPG85XAsEuVSDsLegG+8IVpo9+yX2EtNYTpd0gUGAw9VtbEghWMSWqk/IQzPCNqnXrbZ6zi2wQ== X-Bogosity: Ham, tests=bogofilter, spamicity=0.000020, version=1.2.4 Sender: owner-linux-mm@kvack.org Precedence: bulk X-Loop: owner-majordomo@kvack.org List-ID: List-Subscribe: List-Unsubscribe: On Thu, Jan 29, 2026 at 11:02=E2=80=AFPM Al Viro = wrote: > OK. Could you take a clone of mainline repository and in there run > ; git fetch git://git.kernel.org:/pub/scm/linux/kernel/git/viro/vfs.git f= or-wsamuel:for-wsamuel > then > ; git diff for-wsamuel e5bf5ee26663 > to verify that for-wsamuel is identical to tree you've seen breakage on > ; git diff for-wsamuel-base 1544775687f0 > to verify that for-wsamuel-base is the tree where the breakage did not re= produce > Then bisect from for-wsamuel-base to for-wsamuel. > > Basically, that's the offending commit split into steps; let's try to fig= ure > out what causes the breakage with better resolution... Confirming that bisect points to this patch: 09e88dc22ea2 (serialize ffs_ep0_open() on ffs->mutex)