Re: [PATCH v4] f2fs: fix long latency due to discard during umount

[Chao Yu]

On 2020/4/15 11:31, Sahitya Tummala wrote:
> F2FS already has a default timeout of 5 secs for discards that
> can be issued during umount, but it can take more than the 5 sec
> timeout if the underlying UFS device queue is already full and there
> are no more available free tags to be used. Fix this by submitting a
> small batch of discard requests so that it won't cause the device
> queue to be full at any time and thus doesn't incur its wait time
> in the umount context.
> 
> Signed-off-by: Sahitya Tummala <stummala@xxxxxxxxxxxxxx>

Reviewed-by: Chao Yu <yuchao0@xxxxxxxxxx>

Thanks,