From: Martin Peschke <mp3@de.ibm.com>
To: linux-scsi@vger.kernel.org
Subject: question on scsi_alloc_sdev()
Date: Thu, 10 Aug 2006 16:37:43 +0200 [thread overview]
Message-ID: <44DB44B7.9080708@de.ibm.com> (raw)
Does anybody know for sure whether scsi_alloc_sdev() is guaranteed to
be called in process context or not?
There seem to be contradictory signs in scsi_scan.c:
scsi_alloc_sdev() uses GFP_ATOMIC, as related functions do.
It might be called in a section protected by a mutex.
I conducted a little experiment using might_sleep() in scsi_alloc_sdev()
- no backtrace on the console, hence process context.
Or, is the purpose of GFP_ATOMIC just (SCSI) I/O avoidance, and sleeping
isn't an issue?
Thanks,
Martin
next reply other threads:[~2006-08-10 14:37 UTC|newest]
Thread overview: 2+ messages / expand[flat|nested] mbox.gz Atom feed top
2006-08-10 14:37 Martin Peschke [this message]
2006-08-10 15:03 ` question on scsi_alloc_sdev() James Bottomley
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