Re: [PATCH v4 00/54] tree-in-dcache stuff

On Thu, Jan 29, 2026 at 11:02 PM Al Viro [off-list ref] 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 for-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 reproduce
Then bisect from for-wsamuel-base to for-wsamuel.

Basically, that's the offending commit split into steps; let's try to figure
out what causes the breakage with better resolution...

Confirming that bisect points to this patch: 09e88dc22ea2 (serialize
ffs_ep0_open() on ffs->mutex)