Date: Thu, 17 May 2018 16:29:10 +0000 From: bugzilla-noreply@freebsd.org To: fs@FreeBSD.org Subject: [Bug 210316] panic after trying to r/w mount msdosfs on write protected media Message-ID: <bug-210316-3630-qsaXCpYUXF@https.bugs.freebsd.org/bugzilla/> In-Reply-To: <bug-210316-3630@https.bugs.freebsd.org/bugzilla/> References: <bug-210316-3630@https.bugs.freebsd.org/bugzilla/>
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https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=210316 --- Comment #16 from Warner Losh <imp@FreeBSD.org> --- (In reply to Andriy Gapon from comment #14) bp = getblk(...) bp->b_flags |= B_INVAL | B_RELBUF | B_NOCACHE; bp->b_flags &= ~(B_ASYNC | B_CACHE); brelse(bp); maybe we need a bfinval(bp) that does that. "Forced" is the 'f' but I'm open to any other name. Basically "Throw away this buffer I know is dirty." We have a 'flush' operation but no 'invalidate' or 'throw away' operation for these cache entries. If we centralize it, we'll have fewer gross hacks like this in the system that "should work" but gradually drift away from working because of some subtle change in what B_NOCACHE means 5 years from now... -- You are receiving this mail because: You are the assignee for the bug.
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