Date: Wed, 5 Jan 2000 16:06:57 -0500 (EST) From: Luoqi Chen <luoqi@watermarkgroup.com> To: freebsd-hackers@FreeBSD.ORG, zzhang@cs.binghamton.edu Subject: Re: Post a signal within an interrupt handler Message-ID: <200001052106.QAA01362@lor.watermarkgroup.com>
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> While reading the code vfs_aio.c, I find out some comments saying it is > not safe to post a signal from the interrupt handler aio_physwakeup(). So > it calls timeout(9) within that handler and let the timeout routine to > post the signal. I do not understand this. Isn't the timeout mechanism > also driven by an interrupt (clock)? > > Any enlightment is appreciated. > > -Zhihui > AFAIK it is safe to post a signal in an interrupt context. Maybe it has more to do with reducing interrupt latency than safety. -lq To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-hackers" in the body of the message
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