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Re: [PATCH] storage: only fallocate when allocation matches capacity

On 9/2/20 3:58 PM, Christian Ehrhardt wrote:
In c9ec7088 "storage: extend preallocation flags support for qemu-img"
the option to fallocate was added and meant to be active when (quote):
"the XML described storage <allocation> matches its <capacity>"

Up until recently 81a3042a12 "storage_util: fix qemu-img sparse allocation"
the compared allocation size was an order of magnitude too small, but still
it does use fallocate too often unless capacity>allocation.

This change fixes the comparison to match the intended description
of the feature.

Fixes: c9ec7088c7a3f4cd26bb471f1f243931fff6f4f9
Fixes: https://bugzilla.redhat.com/show_bug.cgi?id=1759454
Fixes: https://bugs.launchpad.net/ubuntu/focal/+source/libvirt/+bug/1847105

Signed-off-by: Christian Ehrhardt <christian ehrhardt canonical com>
  src/storage/storage_util.c | 6 +++---
  1 file changed, 3 insertions(+), 3 deletions(-)

Reviewed-by: Michal Privoznik <mprivozn redhat com>

And sorry for making the mess earlier (~2 years ago).


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