Date: Fri, 21 Jun 2019 15:31:16 -0700 From: Conrad Meyer <cem@freebsd.org> To: Alan Somers <asomers@freebsd.org> Cc: FreeBSD CURRENT <freebsd-current@freebsd.org> Subject: Re: Reducing UFS corruption from unclean shutdowns? Message-ID: <CAG6CVpVZ2YaWzc7YbAoP=sY_NK4qcDbkyctDBW%2BOXoY6Du3WYQ@mail.gmail.com> In-Reply-To: <CAOtMX2heRbFONA4e7-buFgZeykCW13h1dC1DTVYOLFAier8wPg@mail.gmail.com> References: <CAOtMX2jPut4ve-Tr7DyikxXqnmqycyjEUpNmAiwUSXbQrK3iCA@mail.gmail.com> <C3016BDF-4B51-4A59-94F2-CCBD0DC4562E@samsco.org> <CAOtMX2jXiaOWpVdEg3_nBYinJWd=iwN_38hQ4eMOocgs8dMWhQ@mail.gmail.com> <F93827F6-1B99-4BDD-B245-C9594AD28ED7@samsco.org> <tkrat.bc0479d0867a8175@FreeBSD.org> <D7FC707D-B863-47F2-9580-C07881AAC866@samsco.org> <CAOtMX2heRbFONA4e7-buFgZeykCW13h1dC1DTVYOLFAier8wPg@mail.gmail.com>
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On Fri, Jun 21, 2019 at 2:55 PM Alan Somers <asomers@freebsd.org> wrote: > I would've thought that immediately following a sync(8), the > filesystem would be consistent. Why do I still see errors after a > panic in files that were written before I sync()ed? > -Alan Hi Alan, Contra the name, sync(2) (sync(8)) isn't synchronous. It invokes VFS_SYNC() with MNT_NOWAIT across all mountpoints. Cheers, Conrad
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