On 09/09/2016 01:00 PM, Ritesh Raj Sarraf wrote:
-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA512 Hi Jens, [Please CC me in replies. I'm not subscribed to the list] Based on your announcement about the writeback patches, I have picked up your changes for testing. I tested it on a 4.7.3 stable kernel with patches applied from your axboe/wb- buf-throttle-v4.7 branch. Instead of the infamous dd use case, I picked up the other generic one i.e. to build the linux kernel. Machine config: Intel(R) Core(TM) i5-4210U CPU @ 1.70GHzRAM: 8 GiB Disk: Rotational SATA HDD Hitachi - 7200 RPM The machine has 4 logical CPUs. Unfortunately, the issue is still easily reproducible. Building a kernel with defaults, which results in make -j4, ended up stalling the entire OS.
What drive is hosting the system and kernel build? I think the current branch isn't aggressive enough on SATA style QD=32 devices with write back caching, so if that's what you are running, it'd be great if you could try a patch or two so we can improve this situation for you. The v4.7 branch is outdated. Let me spin a new one, that's probably the best way to start. -- Jens Axboe -- To unsubscribe from this list: send the line "unsubscribe linux-block" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
