On 09/07/2015 11:54 AM, Johannes Berg wrote:
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.
Thanks. Went back to devcoredump.c and reading the code found that
devcd_data_write schedules devcd_del work without any condition. Sorry
for being lazy.
Gr. AvS
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
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