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[PATCH 0/2] block: add logging facility for long standing IO requests
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From: |
Denis V. Lunev |
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Subject: |
[PATCH 0/2] block: add logging facility for long standing IO requests |
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Date: |
Fri, 10 Jul 2020 20:27:09 +0300 |
There are severe delays with IO requests processing if QEMU is running in
virtual machine or over software defined storage. Such delays potentially
results in unpredictable guest behavior. For example, guests over IDE or
SATA drive could remount filesystem read-only if write is performed
longer than 10 seconds.
Such reports are very complex to process. Some good starting point for this
seems quite reasonable. This patch provides one. It adds logging of such
potentially dangerous long IO operations.
Signed-off-by: Denis V. Lunev <den@openvz.org>
CC: Vladimir Sementsov-Ogievskiy <vsementsov@virtuozzo.com>
CC: Kevin Wolf <kwolf@redhat.com>
CC: Max Reitz <mreitz@redhat.com>