From: vishu.kernel@gmail.com (Vishwas Srivastava)
To: kernelnewbies@lists.kernelnewbies.org
Subject: Can interrupt be missed between interrupt disable/enable window?
Date: Mon, 21 Mar 2016 12:41:54 +0530 [thread overview]
Message-ID: <CAGM3cC7jsm=9XhZ0xZDLGBLBV_UsSM5TOGA95xRbdhsT7=-KTg@mail.gmail.com> (raw)
Kernel code heavily uses the spinlock primitives
spin_lock_irqsave/restore plus local interrupt disabling/ enabling, all
across the code.
Is there a possibility that the interrupts might get
missed in this small window
disable interrupts
.............
............. <<<<<<<<<<<----------------------
interrupts is trigerred here
enable interrupts
specially when the irq
affinity has been set to the same core on which the
above mentioned code (disabling / enabling the irq's)
runs?
How the linux deals with this kind of scenario?
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next reply other threads:[~2016-03-21 7:11 UTC|newest]
Thread overview: 3+ messages / expand[flat|nested] mbox.gz Atom feed top
2016-03-21 7:11 Vishwas Srivastava [this message]
2016-03-21 8:14 ` Can interrupt be missed between interrupt disable/enable window? Chetan Nanda
2016-03-21 9:11 ` Crazyiop
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