Messages in this thread | | | From | Oliver Neukum <> | Subject | Re: [GIT PATCH] TTY patches for 2.6.33-git | Date | Mon, 14 Dec 2009 11:39:48 +0100 |
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Am Montag, 14. Dezember 2009 06:30:15 schrieb Arjan van de Ven: > > We have the bkl tracepoints for that, attaching an example below, > > blkdev_get/bkldev_put is among the highest consumer for me. > > we have a trace, but not a number that anyone can just pull out without > having to go through great lengths to set stuff up... (esp to capture a > boot)... > Adding a counter always to the lock_kernel function should be fine > instead...
But don't we need to know how long it is held? If you just count you'll make code that drops it while it can look bad.
Regards Oliver
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