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Message-ID: <20250501133736.GB205188@mit.edu> Date: Thu, 1 May 2025 09:37:36 -0400 From: "Theodore Ts'o" <tytso@....edu> To: harshad shirwadkar <harshadshirwadkar@...il.com> Cc: linux-ext4@...r.kernel.org, jack@...e.cz, harshads@...gle.com Subject: Re: [PATCH v8 0/9] Ext4 Fast Commit Performance Patchset On Thu, May 01, 2025 at 12:14:04AM -0400, Theodore Ts'o wrote: > > I was applying your patches on 6.15-rc3 and this evening I tried > applying them against 6.15-rc2, which has been failing as well. > > There's nothing else on the ext4 dev branch yet, but there were a > large number of ext4 patches which landed between 6.14-rc2 and > 6.15-rc2. I tried bisecting your patch series using: kvm-xfstests -c ext4/fast_commit generic/127 generic/241 generic/418 and the first bad commit was "ext4: rework fast commit commit path". - Ted git bisect start # status: waiting for both good and bad commits # good: [9c32cda43eb78f78c73aee4aa344b777714e259b] Linux 6.15-rc3 git bisect good 9c32cda43eb78f78c73aee4aa344b777714e259b # status: waiting for bad commit, 1 good commit known # bad: [a147d000c6914a51becf0d32bbb8c9124e45f6ed] ext4: hold s_fc_lock while during fast commit git bisect bad a147d000c6914a51becf0d32bbb8c9124e45f6ed # good: [8ffd015db85fea3e15a77027fda6c02ced4d2444] Linux 6.15-rc2 git bisect good 8ffd015db85fea3e15a77027fda6c02ced4d2444 # bad: [bfd1ce278bb3cfea0ad7017de608691a83c372bf] ext4: rework fast commit commit path git bisect bad bfd1ce278bb3cfea0ad7017de608691a83c372bf # good: [36eb0b696b73895b7e40dbf3043275fdc9bcb1fe] ext4: for committing inode, make ext4_fc_track_inode wait git bisect good 36eb0b696b73895b7e40dbf3043275fdc9bcb1fe # good: [94cee94db3acfe189463f4343ca7bd9c83570cb7] ext4: mark inode dirty before grabbing i_data_sem in ext4_setattr git bisect good 94cee94db3acfe189463f4343ca7bd9c83570cb7 # first bad commit: [bfd1ce278bb3cfea0ad7017de608691a83c372bf] ext4: rework fast commit commit path
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