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gJCDK0rFp6PrZLQhMvjqenStYtn5QSZsihCiZnYYWOD/XZKutR3idAfoZwAIHM5JzFxebEHH/E0J7WRBu+r6tBgN2sy7ZkD9DdJVzF54DR/l7LdHDtv0HJ/sACtjYLLBA9cITTXQ3rmmutIZrqeBlqGkqImvZZu8ciyvAikhdC17JZAsk6ir6CQv9WkMGul/dQPQgvu+InozO0ZA4Eg/W1pcB2BqYaW/r6WdYMGFlPs0vpOjNBdq5cpNKgm99jwjpLotrDCyfoWXg1zaMJvivg6NdvYP2jiLzsfDp4irnMYXVq6FQMgVAtE0eP1rs+rSZCQYkAHb47J5ccULEViURUM06swiE2jgbtPJMT2Ts/13TmnE= X-Bogosity: Ham, tests=bogofilter, spamicity=0.000000, 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 28-Nov-24 9:52 AM, Matthew Wilcox wrote: > On Thu, Nov 28, 2024 at 09:31:50AM +0530, Bharata B Rao wrote: >> However a point of concern is that FIO bandwidth comes down drastically >> after the change. >> >> default inode_lock-fix >> rw=30% >> Instance 1 r=55.7GiB/s,w=23.9GiB/s r=9616MiB/s,w=4121MiB/s >> Instance 2 r=38.5GiB/s,w=16.5GiB/s r=8482MiB/s,w=3635MiB/s >> Instance 3 r=37.5GiB/s,w=16.1GiB/s r=8609MiB/s,w=3690MiB/s >> Instance 4 r=37.4GiB/s,w=16.0GiB/s r=8486MiB/s,w=3637MiB/s > > Something this dramatic usually only happens when you enable a debugging > option. Can you recheck that you're running both A and B with the same > debugging options both compiled in, and enabled? It is the same kernel tree with and w/o Mateusz's inode_lock changes to block/fops.c. I see the config remains same for both the builds. Let me get a run for both base and patched case w/o running perf lock contention to check if that makes a difference. Regards, Bharata.