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Revert "s390/dasd: Add discard support for ESE volumes"
This reverts commit 7e64db1. The thin provisioning feature introduces an IOCTL and the discard support to allow userspace tools and filesystems to release unused and previously allocated space respectively. During some internal performance improvements and further tests, the release of allocated space revealed some issues that may lead to data corruption in some configurations when filesystems are mounted with discard support enabled. While we're working on a fix and trying to clarify the situation, this commit reverts the discard support for ESE volumes to prevent potential data corruption. Cc: <stable@vger.kernel.org> # 5.3 Signed-off-by: Stefan Haberland <sth@linux.ibm.com> Signed-off-by: Jens Axboe <axboe@kernel.dk>
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Stefan Haberland
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Jens Axboe
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Oct 1, 2019
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