From: Johannes Berg <johannes@sipsolutions.net>
To: Arend van Spriel <arend@broadcom.com>
Cc: "linux-wireless@vger.kernel.org" <linux-wireless@vger.kernel.org>
Subject: Re: using dev_coredumpv
Date: Mon, 07 Sep 2015 11:54:06 +0200 [thread overview]
Message-ID: <1441619646.1940.2.camel@sipsolutions.net> (raw)
In-Reply-To: <55ED5D28.8000309@broadcom.com> (sfid-20150907_114727_883458_63EE9237)
On Mon, 2015-09-07 at 11:47 +0200, Arend van Spriel wrote:
> Hi Johannes,
>
> I am looking at devcoredump subsystem and I was wondering about the
> lifetime of the devcd folder. With dev_coredumpm() the description says:
> "If a previous one hasn't been read yet, the new coredump is
> discarded.". I am wondering what "read" means here. For testing I call
> dev_coredumpv() every second, but when I hexdump the data file it does
> not create a new devcd folder. That only occurs after 5 minutes. Is that
> expected?
I suppose "read" should say "discarded by userspace", but I always
assumed userspace would read the file and then discard the coredump by
writing (anything iirc) to the file.
IOW - yes, this is expected, you should write to the data file which
makes it (and the folder) disappear and allows creating a new one.
johannes
next prev parent reply other threads:[~2015-09-07 9:54 UTC|newest]
Thread overview: 3+ messages / expand[flat|nested] mbox.gz Atom feed top
2015-09-07 9:47 using dev_coredumpv Arend van Spriel
2015-09-07 9:54 ` Johannes Berg [this message]
2015-09-07 16:35 ` Arend van Spriel
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