[PATCH 1/2] Revert "mmc: core: wait while adding MMC host to ensure root mounts successfully"

Adrian Hunter
2013-04-04T13:36:08Z

This reverts commit 3500ed90b26a9935b943b5e2e4cd3226600d6b58.

The reverted patch caused a significant performance regression when
booting with the root file system on eMMC.

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 was an addition of 310 ms which is a 19% performance degradation.

Signed-off-by: Adrian Hunter <adrian.hunter@intel.com>
---
drivers/mmc/core/core.c | 1 -
1 file changed, 1 deletion(-)

diff --git a/drivers/mmc/core/core.c b/drivers/mmc/core/core.c
index ad7decc..3bf1c46 100644
--- a/drivers/mmc/core/core.c
+++ b/drivers/mmc/core/core.c
@@ -2418,7 +2418,6 @@ void mmc_start_host(struct mmc_host *host)
host->rescan_disable = 0;
mmc_power_up(host);
mmc_detect_change(host, 0);
- mmc_flush_scheduled_work();
}

void mmc_stop_host(struct mmc_host *host)
--
1.7.11.7