From: "ibrahim via 9fans" <9fans@9fans.net>
To: 9fans <9fans@9fans.net>
Subject: [9fans] odd rwakeup qunlock behaviour in 9vx
Date: Sat, 4 Nov 2023 21:35:04 -0400 [thread overview]
Message-ID: <16991481040.88FDBb.122754@composer.9fans.topicbox.com> (raw)
[-- Attachment #1: Type: text/plain, Size: 710 bytes --]
I have a function chan_send in which :
chan_send (...) {
qlock()
rwakeup(...)
qunlock()
}
If two such chan_send functions are called without a "task-switch" 9vx crashes. A work around for this problem is to place a sleep(0) after qunlock to enforce a task-switch
chan_send(...) {
qlock()
rwakeup(...)
qunlock()
sleep(0)
}
This behaviour isn't documented anywhere. I'll test it next on bare metal with a real kernel to find out if this is only a 9vx problem.
------------------------------------------
9fans: 9fans
Permalink: https://9fans.topicbox.com/groups/9fans/T7a5bb3cde50a8a9a-Meba86a2cee63818883e31403
Delivery options: https://9fans.topicbox.com/groups/9fans/subscription
[-- Attachment #2: Type: text/html, Size: 1507 bytes --]
next reply other threads:[~2023-11-05 1:35 UTC|newest]
Thread overview: 6+ messages / expand[flat|nested] mbox.gz Atom feed top
2023-11-05 1:35 ibrahim via 9fans [this message]
2023-11-08 21:08 ` ori
2023-11-08 23:42 ` ibrahim via 9fans
2023-11-09 3:16 ` Lucio De Re
2023-11-10 2:24 ` ibrahim via 9fans
2023-11-10 6:40 ` Lucio De Re
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=16991481040.88FDBb.122754@composer.9fans.topicbox.com \
--to=9fans@9fans.net \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox;
as well as URLs for NNTP newsgroup(s).