Messages in this thread |  | | | Date | Tue, 09 Aug 2005 15:24:33 +0200 | | From | Frederic TEMPORELLI <> | | Subject | max workqueue name length |
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Hello,
When creating a workqueue, workqueue name is limited to 10 chars (kernel/workqueue.c , function is __create_workqueue, test is done in a BUG_ON).
Why has this length be limited to 10 chars ? Can I safely increase this max length (13 chars should be enough...) ?
Some comments about these questions:
In SCSI layer, HBA kernel ID is incremented after each modprobe/rmmod.
Then, when a scsi driver is managing a working queue and HBA kernel ID is greater than 99 (let's assume that you have modprobe/rmmod the scsi driver to get this ID to 99, or you may have play with 'scsi_debug' module), an oops is generated when loading again the driver (and the driver is frozen).
This is because working queue name format is "scsi_wq_%d" (drivers/scsi/hosts.c , function scsi_add_host, %d is the HBA ID), and so working queue name length is greater than 10 chars when HBA kernel ID is > 99...
Best regards
-- Frederic TEMPORELLI - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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