Re: [PATCH 14/17] bcache: back to cache all readahead I/Os

Coly Li
2020-01-23T17:28:06Z

On 2020/1/24 1:19 上午, Michael Lyle wrote:
> Hi Coly and Jens--
>
> One concern I have with this is that it's going to wear out
> limited-lifetime SSDs a -lot- faster. Was any thought given to making
> this a tunable instead of just changing the behavior? Even if we have
> an anecdote or two that it seems to have increased performance for
> some workloads, I don't expect it will have increased performance in
> general and it may even be costly for some workloads (it all comes
> down to what is more useful in the cache-- somewhat-recently readahead
> data, or the data that it is displacing).

Hi Mike,

Copied. This is good suggestion, I will do it after I back from Lunar
New Year vacation, and submit it with other tested patches in following
v5.6-rc versions.

Thanks.

Coly Li

[snipped]

--

Coly Li