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=3D210316 --- Comment #16 from Warner Losh <imp@FreeBSD.org> --- (In reply to Andriy Gapon from comment #14) bp =3D getblk(...) bp->b_flags |=3D B_INVAL | B_RELBUF | B_NOCACHE; bp->b_flags &=3D ~(B_ASYNC | B_CACHE); brelse(bp); maybe we need a bfinval(bp) that does that. "Forced" is the 'f' but I'm ope= n 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 c= ache 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... --=20 You are receiving this mail because: You are the assignee for the bug.=
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