gfs2: Fix metadata read-ahead during truncate (2)

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commit e7445ceddf upstream.

The previous attempt to fix for metadata read-ahead during truncate was
incorrect: for files with a height > 2 (1006989312 bytes with a block
size of 4096 bytes), read-ahead requests were not being issued for some
of the indirect blocks discovered while walking the metadata tree,
leading to significant slow-downs when deleting large files.  Fix that.

In addition, only issue read-ahead requests in the first pass through
the meta-data tree, while deallocating data blocks.

Fixes: c3ce5aa9b0 ("gfs2: Fix metadata read-ahead during truncate")
Cc: stable@vger.kernel.org # v4.16+
Signed-off-by: Andreas Gruenbacher <agruenba@redhat.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

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Andreas Gruenbacher 2018-11-08 20:14:29 +00:00 • committed by Greg Kroah-Hartman

parent 8793f67af1

commit 55795dac8e

1 changed files with 10 additions and 4 deletions

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fs/gfs2/bmap.c

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