diff options
| author | Tatyana Brokhman <tlinder@codeaurora.org> | 2014-12-03 23:38:06 +0200 |
|---|---|---|
| committer | Subhash Jadavani <subhashj@codeaurora.org> | 2016-05-31 15:25:34 -0700 |
| commit | 86dc987a4fc46b6fdad7cae3c28993e852567e84 (patch) | |
| tree | e9c5235b3b74c948b68d5d7d0412678d4dfe8bf7 /include/linux | |
| parent | fd7c52accff9a54a6ce2e82f06fb50ad22d775e2 (diff) | |
mmc: block: Add write packing control
The write packing control will ensure that read requests latency is
not increased due to long write packed commands.
The trigger for enabling the write packing is managing to pack several
write requests. The number of potential packed requests that will trigger
the packing can be configured via sysfs by writing the required value to:
/sys/block/<block_dev_name>/num_wr_reqs_to_start_packing.
The trigger for disabling the write packing is fetching a read request.
Change-Id: I22e8ab04cd9aca220678784c39306068a0996790
Signed-off-by: Maya Erez <merez@codeaurora.org>
Signed-off-by: Tatyana Brokhman <tlinder@codeaurora.org>
[merez@codeaurora.org: fixed trivial conflicts]
Signed-off-by: Maya Erez <merez@codeaurora.org>
[subhashj@codeaurora.org: fixed trivial merge conflicts]
Signed-off-by: Subhash Jadavani <subhashj@codeaurora.org>
Diffstat (limited to 'include/linux')
| -rw-r--r-- | include/linux/mmc/host.h | 1 |
1 files changed, 1 insertions, 0 deletions
diff --git a/include/linux/mmc/host.h b/include/linux/mmc/host.h index 996969baca0a..1f4c2cc72b8c 100644 --- a/include/linux/mmc/host.h +++ b/include/linux/mmc/host.h @@ -302,6 +302,7 @@ struct mmc_host { #define MMC_CAP2_HSX00_1_2V (MMC_CAP2_HS200_1_2V_SDR | MMC_CAP2_HS400_1_2V) #define MMC_CAP2_SDIO_IRQ_NOTHREAD (1 << 17) #define MMC_CAP2_NO_WRITE_PROTECT (1 << 18) /* No physical write protect pin, assume that card is always read-write */ +#define MMC_CAP2_PACKED_WR_CONTROL (1 << 19) /* Allow write packing control */ #define MMC_CAP2_NONHOTPLUG (1 << 25) /*Don't support hotplug*/ mmc_pm_flag_t pm_caps; /* supported pm features */ |