10
votes
Accepted
How to interpret the refcnt field in /proc/crypto?
In general no, the reference count never goes below 1. /proc/crypto’s refcnt field shows the value of the cra_refcnt field in struct crypto_alg, and that field is set to 1 on successful initialisation....
- 481k
3
votes
rsyslog holds on to dirty pages and does not flush pages to disk
rsyslogd, like syslogd before it, doesn't sync log files unless you tell it to (otherwise it would likely tank filesystem performance with all of the writes it does).
From man rsyslog.conf:
By ...
- 83.9k
3
votes
Accepted
How to use ≥ 16 usbip ports from one host controller on Debian?
this is clamped to 15 in Kconfig here.
You can of course try to modify Kconfig, but I suspect that might go wrong if other parts of the Linux USBIP framework, which might assume that all change flag ...
- 51.3k
3
votes
Accepted
What is the cost of listening on ports?
Let's assume a use case of wanting to play with networking, an unknown list of ports from a hello world echo on 7/tcp on up. VMs or containers would be convenient to experiment with. And assume you ...
- 641
1
vote
What is the best way to detect busy CPU cores for blk-mq request steering in Linux kernel?
Disclaimer: I am not familiar with this kind of problem.
It seems that the number of I/O requests per CPU core is not the only influence on I/O perfomance. Having more on the same core may be ...
- 94.5k
1
vote
Hibernation does not find enough memory despite nearly zero swap usage
I ran into this also on kernel 6.1.53 (Debian) and it turned out to be hugepages allocated for an app. The app that uses the hugepages was stopped prior to attempting to hibernate but that didn't ...
- 186
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