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| author | Linus Torvalds <torvalds@woody.linux-foundation.org> | 2007-07-10 23:57:52 +0200 |
|---|---|---|
| committer | Linus Torvalds <torvalds@woody.linux-foundation.org> | 2007-07-10 23:57:52 +0200 |
| commit | 4c75f7416f51b0c6855952467a5db04f9c598f09 (patch) | |
| tree | dbe06f7e69d68cf99b20567577c9c5488e4e1e8c /drivers/mmc/card/Kconfig | |
| parent | Merge branch 'upstream-linus' of master.kernel.org:/pub/scm/linux/kernel/git/... (diff) | |
| parent | mmc: at91_mci: fix hanging and rework to match flowcharts (diff) | |
| download | linux-4c75f7416f51b0c6855952467a5db04f9c598f09.tar.xz linux-4c75f7416f51b0c6855952467a5db04f9c598f09.zip | |
Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/drzeus/mmc
* 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/drzeus/mmc:
mmc: at91_mci: fix hanging and rework to match flowcharts
mmc: at91_mci typo
sdhci: Fix "Unexpected interrupt" handling
mmc: fix silly copy-and-paste error
mmc: move layer init and workqueue to core file
mmc: refactor host class handling
mmc: refactor bus operations
sdhci: add ene controller id
mmc: bounce requests for simple hosts
Diffstat (limited to 'drivers/mmc/card/Kconfig')
| -rw-r--r-- | drivers/mmc/card/Kconfig | 18 |
1 files changed, 18 insertions, 0 deletions
diff --git a/drivers/mmc/card/Kconfig b/drivers/mmc/card/Kconfig index 9320a8c73239..a49cb9737cd8 100644 --- a/drivers/mmc/card/Kconfig +++ b/drivers/mmc/card/Kconfig @@ -14,3 +14,21 @@ config MMC_BLOCK mount the filesystem. Almost everyone wishing MMC support should say Y or M here. +config MMC_BLOCK_BOUNCE + bool "Use bounce buffer for simple hosts" + depends on MMC_BLOCK + default y + help + SD/MMC is a high latency protocol where it is crucial to + send large requests in order to get high performance. Many + controllers, however, are restricted to continuous memory + (i.e. they can't do scatter-gather), something the kernel + rarely can provide. + + Say Y here to help these restricted hosts by bouncing + requests back and forth from a large buffer. You will get + a big performance gain at the cost of up to 64 KiB of + physical memory. + + If unsure, say Y here. + |