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| author | Nicholas Bellinger <nab@linux-iscsi.org> | 2013-12-12 12:24:11 -0800 |
|---|---|---|
| committer | Nicholas Bellinger <nab@linux-iscsi.org> | 2013-12-19 00:18:54 -0800 |
| commit | 95cadace8f3959282e76ebf8b382bd0930807d2c (patch) | |
| tree | 2b8773e84f7dc600eba50665d18377f2f130b1e8 /drivers/target/target_core_file.h | |
| parent | 2853c2b6671509591be09213954d7249ca6ff224 (diff) | |
| download | blackbird-obmc-linux-95cadace8f3959282e76ebf8b382bd0930807d2c.tar.gz blackbird-obmc-linux-95cadace8f3959282e76ebf8b382bd0930807d2c.zip | |
target/file: Update hw_max_sectors based on current block_size
This patch allows FILEIO to update hw_max_sectors based on the current
max_bytes_per_io. This is required because vfs_[writev,readv]() can accept
a maximum of 2048 iovecs per call, so the enforced hw_max_sectors really
needs to be calculated based on block_size.
This addresses a >= v3.5 bug where block_size=512 was rejecting > 1M
sized I/O requests, because FD_MAX_SECTORS was hardcoded to 2048 for
the block_size=4096 case.
(v2: Use max_bytes_per_io instead of ->update_hw_max_sectors)
Reported-by: Henrik Goldman <hg@x-formation.com>
Cc: <stable@vger.kernel.org> #3.5+
Signed-off-by: Nicholas Bellinger <nab@linux-iscsi.org>
Diffstat (limited to 'drivers/target/target_core_file.h')
| -rw-r--r-- | drivers/target/target_core_file.h | 5 |
1 files changed, 4 insertions, 1 deletions
diff --git a/drivers/target/target_core_file.h b/drivers/target/target_core_file.h index 37ffc5bd2399..d7772c167685 100644 --- a/drivers/target/target_core_file.h +++ b/drivers/target/target_core_file.h @@ -7,7 +7,10 @@ #define FD_DEVICE_QUEUE_DEPTH 32 #define FD_MAX_DEVICE_QUEUE_DEPTH 128 #define FD_BLOCKSIZE 512 -#define FD_MAX_SECTORS 2048 +/* + * Limited by the number of iovecs (2048) per vfs_[writev,readv] call + */ +#define FD_MAX_BYTES 8388608 #define RRF_EMULATE_CDB 0x01 #define RRF_GOT_LBA 0x02 |
