On Fri, Dec 31, 2021 at 4:15 PM Coiby Xu coxu@redhat.com wrote:
On Fri, Dec 31, 2021 at 03:48:25PM +0800, Coiby Xu wrote:
On Fri, Dec 31, 2021 at 02:42:17PM +0800, Tao Liu wrote:
Hi Coiby,
[...]
As for the file size of kdump.img, zstd makes a smaller size, which is benificial for kdump kernel limited memory.
As for the time consumption for compression when making kdump.img, zstd doesn't show a clear advance than zlib.
^^^^^^^^^^^^^^^^^^Should it be "an obvious advantage over"?
For bare metal x86_64 machine, zstd user time decrease for ~1s, sys time increase for ~0.03s For PowerVM hosted ppc64le VM, zstd user time varies for +1s ~ -7s, sys time increase for ~0.03s
I say "doesn't show a clear advance", meaning the time 1s may not be obviously observable to users.
Thanks for the explanation. I haven't seen this phrase "a clear advance" before. Maybe a different phrase should be used.
How about "the users may be oblivious to the change"?
OK, I will rephrase it in the v5 patch.
Thanks, Tao Liu
-- Best regards, Coiby