Giant-free ahc?

From: Daniel Eriksson <daniel_k_eriksson_at_telia.com>
Date: Mon, 11 Oct 2004 20:48:38 +0200
Is anyone working on fine-grained locking for the ahc driver?

I just upgraded one of my servers from UP to SMP, and noticed that *Giant
showed up a lot when running top for processes accessing data on the SCSI
discs. It could be a GIANT lock for some other resource of course, but since
the ahc driver reports [GIANT-LOCKED] during boot, and since all the
processes were accessing data on SCSI discs I just assumed it was waiting
for a lock in the ahc driver.

Is there a simple way to figure out which resource the processes are waiting
for (without compiling in any additional debugging)?

/Daniel Eriksson
Received on Mon Oct 11 2004 - 16:48:43 UTC

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