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authorChristian Krinitsin <mail@krinitsin.com>2025-06-30 12:24:58 +0000
committerChristian Krinitsin <mail@krinitsin.com>2025-06-30 12:27:06 +0000
commit33606b41d35115f887ea688b1a16f2ff85bf2fe4 (patch)
tree406b2c7b19a087ba437c68f3dbf0b589fa1d6150 /results/scraper/launchpad-without-comments/1652459
parentadedf8771bc4de3113041ca21bd4d0d1c0014b6a (diff)
downloadqemu-analysis-33606b41d35115f887ea688b1a16f2ff85bf2fe4.tar.gz
qemu-analysis-33606b41d35115f887ea688b1a16f2ff85bf2fe4.zip
add launchpad bug reports without comments
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+kvm rbd driver (and maybe others, i.e. qcow2, qed and so on)  does not report DISCARD-ZERO flag
+
+# lsblk -D
+NAME   DISC-ALN DISC-GRAN DISC-MAX DISC-ZERO
+sda           0        4K       1G         0
+├─sda1        0        4K       1G         0
+├─sda2     1024        4K       1G         0
+└─sda5        0        4K       1G         0
+
+
+Last column should be `1` at least for "RBD+discard=unmap" since reading from discarded regions in RBD MUST return zeroes. The same with QCOW2, QED and sparse raw images. KVM should copy value of this flag when real raw device (i.e. real SSD) with discard capability is used as virtual disk.
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