From: bugzilla-daemon@bugzilla.kernel.org
To: linux-scsi@vger.kernel.org
Subject: [Bug 106871] Lower log level for "No Caching mode page found" and "Assuming drive cache: write through"
Date: Sat, 31 Oct 2015 08:06:05 +0000 [thread overview]
Message-ID: <bug-106871-11613-Cv2D6tS5IV@https.bugzilla.kernel.org/> (raw)
In-Reply-To: <bug-106871-11613@https.bugzilla.kernel.org/>
https://bugzilla.kernel.org/show_bug.cgi?id=106871
--- Comment #1 from Tom Yan <tom.ty89@gmail.com> ---
https://bugzilla.kernel.org/show_bug.cgi?id=16490#c8
The question is, why are we even using "write through" as fallback when if it
can be dangerous? What's wrong with using "write back" as fallback instead?
Would a SYNCHRONIZE CACHE command ever be a threat to devices without write
cache or caching mode page?
https://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=b81478d82e389dd0961760f5ff6f56b50d29db6d
https://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=eaa05dfcdb12cf3a7bedf8918dc8699c00944384
Seems like we consider "write back" an safer option everywhere else but we just
somehow require users to use a quirk to switch to that for no reason. This just
looks silly to me.
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prev parent reply other threads:[~2015-10-31 8:06 UTC|newest]
Thread overview: 2+ messages / expand[flat|nested] mbox.gz Atom feed top
2015-10-29 8:29 [Bug 106871] New: Lower log level for "No Caching mode page found" and "Assuming drive cache: write through" bugzilla-daemon
2015-10-31 8:06 ` bugzilla-daemon [this message]
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