From: Petr Vorel <pvorel@suse.cz>
To: Pavel Tatashin <pasha.tatashin@soleen.com>
Cc: tyhicks@linux.microsoft.com, axboe@kernel.dk,
linux-block@vger.kernel.org, linux-kernel@vger.kernel.org,
sashal@kernel.org, jmorris@namei.org, lukas.bulwahn@gmail.com,
hch@lst.de, ming.lei@redhat.com, mzxreary@0pointer.de,
mcgrof@kernel.org, zhengbin13@huawei.com, maco@android.com,
colin.king@canonical.com, evgreen@chromium.org
Subject: Re: [PATCH v3 1/1] loop: scale loop device by introducing per device lock
Date: Tue, 26 Jan 2021 10:24:16 +0100 [thread overview]
Message-ID: <YA/fwFU+Wg6+jr85@pevik> (raw)
In-Reply-To: <20210125201156.1330164-2-pasha.tatashin@soleen.com>
Hi,
> Currently, loop device has only one global lock:
> loop_ctl_mutex.
> This becomes hot in scenarios where many loop devices are used.
> Scale it by introducing per-device lock: lo_mutex that protects the
> fields in struct loop_device. Keep loop_ctl_mutex to protect global
> data such as loop_index_idr, loop_lookup, loop_add.
> Lock ordering: loop_ctl_mutex > lo_mutex.
Reviewed-by: Petr Vorel <pvorel@suse.cz>
Kind regards,
Petr
next prev parent reply other threads:[~2021-01-26 17:17 UTC|newest]
Thread overview: 6+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-01-25 20:11 [PATCH v3 0/1] scale loop device lock Pavel Tatashin
2021-01-25 20:11 ` [PATCH v3 1/1] loop: scale loop device by introducing per " Pavel Tatashin
2021-01-26 9:24 ` Petr Vorel [this message]
2021-01-26 14:22 ` Pavel Tatashin
2021-01-26 9:53 ` Chaitanya Kulkarni
2021-01-26 14:29 ` Pavel Tatashin
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