Revision 5ea47691bd99e1100707ec63364aff72324e2af4 authored by Daniel Drake on 20 March 2019, 06:36:53 UTC, committed by Ulf Hansson on 21 March 2019, 10:19:06 UTC
Setting max_blk_count to 1 here was causing the mmc block layer to always use the MMC_READ_SINGLE_BLOCK command here, which the driver does not DMA-accelerate. Drop the max_blk_ settings here. The mmc host defaults suffice, along with the max_segs and max_seg_size settings, which I have now documented in more detail. Now each MMC command reads 4 512-byte blocks, using DMA instead of PIO. On my SD card, this increases read performance (measured with dd) from 167kb/sec to 4.6mb/sec. Link: http://lkml.kernel.org/r/CAD8Lp47L5T3jnAjBiPs1cQ+yFA3L6LJtgFvMETnBrY63-Zdi2g@mail.gmail.com Signed-off-by: Daniel Drake <drake@endlessm.com> Reviewed-by: Oleksij Rempel <linux@rempel-privat.de> Fixes: c5413ad815a6 ("mmc: add new Alcor Micro Cardreader SD/MMC driver") Cc: stable@vger.kernel.org Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
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File | Mode | Size |
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Kconfig | -rw-r--r-- | 1.4 KB |
Makefile | -rw-r--r-- | 486 bytes |
acl.c | -rw-r--r-- | 3.8 KB |
file.c | -rw-r--r-- | 4.3 KB |
inode.c | -rw-r--r-- | 10.1 KB |
ioctl.c | -rw-r--r-- | 3.9 KB |
jfs_acl.h | -rw-r--r-- | 1.2 KB |
jfs_btree.h | -rw-r--r-- | 4.0 KB |
jfs_debug.c | -rw-r--r-- | 2.5 KB |
jfs_debug.h | -rw-r--r-- | 3.3 KB |
jfs_dinode.h | -rw-r--r-- | 5.8 KB |
jfs_discard.c | -rw-r--r-- | 3.1 KB |
jfs_discard.h | -rw-r--r-- | 1.0 KB |
jfs_dmap.c | -rw-r--r-- | 111.6 KB |
jfs_dmap.h | -rw-r--r-- | 11.2 KB |
jfs_dtree.c | -rw-r--r-- | 100.5 KB |
jfs_dtree.h | -rw-r--r-- | 6.6 KB |
jfs_extent.c | -rw-r--r-- | 17.3 KB |
jfs_extent.h | -rw-r--r-- | 1.3 KB |
jfs_filsys.h | -rw-r--r-- | 8.9 KB |
jfs_imap.c | -rw-r--r-- | 83.8 KB |
jfs_imap.h | -rw-r--r-- | 6.4 KB |
jfs_incore.h | -rw-r--r-- | 7.5 KB |
jfs_inode.c | -rw-r--r-- | 3.5 KB |
jfs_inode.h | -rw-r--r-- | 2.5 KB |
jfs_lock.h | -rw-r--r-- | 1.5 KB |
jfs_logmgr.c | -rw-r--r-- | 58.9 KB |
jfs_logmgr.h | -rw-r--r-- | 14.7 KB |
jfs_metapage.c | -rw-r--r-- | 19.2 KB |
jfs_metapage.h | -rw-r--r-- | 4.2 KB |
jfs_mount.c | -rw-r--r-- | 12.7 KB |
jfs_superblock.h | -rw-r--r-- | 4.1 KB |
jfs_txnmgr.c | -rw-r--r-- | 74.6 KB |
jfs_txnmgr.h | -rw-r--r-- | 8.2 KB |
jfs_types.h | -rw-r--r-- | 4.3 KB |
jfs_umount.c | -rw-r--r-- | 4.0 KB |
jfs_unicode.c | -rw-r--r-- | 3.3 KB |
jfs_unicode.h | -rw-r--r-- | 3.7 KB |
jfs_uniupr.c | -rw-r--r-- | 7.5 KB |
jfs_xattr.h | -rw-r--r-- | 2.5 KB |
jfs_xtree.c | -rw-r--r-- | 91.8 KB |
jfs_xtree.h | -rw-r--r-- | 3.8 KB |
namei.c | -rw-r--r-- | 37.1 KB |
resize.c | -rw-r--r-- | 14.8 KB |
super.c | -rw-r--r-- | 24.7 KB |
symlink.c | -rw-r--r-- | 1.2 KB |
xattr.c | -rw-r--r-- | 25.8 KB |
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