Messages in this thread | | | Date | Thu, 14 Apr 2022 21:26:06 +0200 | From | David Sterba <> | Subject | Re: [PATCH v2] btrfs: zstd: use spin_lock in timer callback |
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On Mon, Apr 11, 2022 at 11:55:41PM +0800, Schspa Shi wrote: > This is an optimization for fix fee13fe96529 ("btrfs: > correct zstd workspace manager lock to use spin_lock_bh()") > > The critical region for wsm.lock is only accessed by the process context and > the softirq context. > > Because in the soft interrupt, the critical section will not be preempted by the > soft interrupt again, there is no need to call spin_lock_bh(&wsm.lock) to turn > off the soft interrupt, spin_lock(&wsm.lock) is enough for this situation. > > Changelog: > v1 -> v2: > - Change the commit message to make it more readable. > > [1] https://lore.kernel.org/all/20220408181523.92322-1-schspa@gmail.com/ > > Signed-off-by: Schspa Shi <schspa@gmail.com>
Added to misc-next, thanks.
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