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From: "Darrick J. Wong" <darrick.wong@oracle.com>
To: sandeen@sandeen.net, darrick.wong@oracle.com
Cc: linux-xfs@vger.kernel.org
Subject: [PATCH 00/11] xfs_scrub: fix IO error reporting
Date: Thu, 05 Sep 2019 20:38:55 -0700	[thread overview]
Message-ID: <156774113533.2645432.14942831726168941966.stgit@magnolia> (raw)

Hi all,

The scrub media error reporting could use some improvements -- first,
scrub can calculate the exact offset of media errors in file mappings,
so we should report more precise offsets.  Second, we only need to scan
the rmap once after assembling the io error bitmap to look for destroyed
metadata (instead of once per error!).  Third, we can filter out
unwritten and attr/cow fork extents from what we report since sector
remapping takes care of unwritten/cow extents and attr media errors
should be detected by phase 3.  Finally, we introduce a new category of
errors that are unfixable by scrub, and assign to this class all the
media errors since there's nothing XFS can do.

If you're going to start using this mess, you probably ought to just
pull from my git trees, which are linked below.

This is an extraordinary way to destroy everything.  Enjoy!
Comments and questions are, as always, welcome.

--D

xfsprogs git tree:
https://git.kernel.org/cgit/linux/kernel/git/djwong/xfsprogs-dev.git/log/?h=scrub-media-error-reporting

fstests git tree:
https://git.kernel.org/cgit/linux/kernel/git/djwong/xfstests-dev.git/log/?h=scrub-media-error-reporting

             reply	other threads:[~2019-09-06  3:39 UTC|newest]

Thread overview: 14+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2019-09-06  3:38 Darrick J. Wong [this message]
2019-09-06  3:39 ` [PATCH 01/11] xfs_scrub: separate media error reporting for attribute forks Darrick J. Wong
2019-09-06  3:39 ` [PATCH 02/11] xfs_scrub: improve reporting of file data media errors Darrick J. Wong
2019-09-06  3:39 ` [PATCH 03/11] xfs_scrub: better reporting of metadata " Darrick J. Wong
2019-09-06  3:39 ` [PATCH 04/11] xfs_scrub: improve reporting of file " Darrick J. Wong
2019-09-06  3:39 ` [PATCH 05/11] xfs_scrub: don't report media errors on unwritten extents Darrick J. Wong
2019-09-06  3:39 ` [PATCH 06/11] xfs_scrub: reduce fsmap activity for media errors Darrick J. Wong
2019-09-06  3:39 ` [PATCH 07/11] xfs_scrub: request fewer bmaps when we can Darrick J. Wong
2019-09-06  3:39 ` [PATCH 08/11] xfs_scrub: fix media verification thread pool size calculations Darrick J. Wong
2019-09-06  3:39 ` [PATCH 09/11] libfrog: clean up platform_nproc Darrick J. Wong
2019-09-06  3:39 ` [PATCH 10/11] xfs_scrub: clean out the nproc global variable Darrick J. Wong
2019-09-06  3:40 ` [PATCH 11/11] xfs_scrub: create a new category for unfixable errors Darrick J. Wong
  -- strict thread matches above, loose matches on Subject: below --
2019-09-25 21:36 [PATCH 00/11] xfs_scrub: fix IO error reporting Darrick J. Wong
2019-08-26 21:31 Darrick J. Wong

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