On Tue, 2013-04-02 at 16:36 +0300, Adrian Hunter wrote: > On my system it is significant: > > Before the patch: > > [ 1.625623] VFS: Mounted root (ext4 filesystem) readonly on device 179:2. > > After the patch: > > [ 1.935851] VFS: Mounted root (ext4 filesystem) readonly on device 179:2. > > That is an addition of 310 ms which is 19% performance degradation.
Are you sure the delay is caused by mmc? On my intel laptop (userspace is Debian/unstable): [ 1.542339] EXT4-fs (sda2): mounted filesystem with ordered data mode. Opts: (null) ... [ 2.735851] mmc0: new high speed SD card at address e624 [ 2.742289] mmcblk0: mmc0:e624 SU02G 1.84 GiB [ 2.752317] mmcblk0: p1 > Please revert the patch. Chris, could provide a pointer on how to improve the patch? Maybe introduce mmc_is_hosting_root() and do something like: - mmc_flush_scheduled_work(); + if (mmc_is_hosting_root()) + mmc_flush_scheduled_work(); -- To unsubscribe from this list: send the line "unsubscribe linux-mmc" in the body of a message to majord...@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html
