Sam Bradshaw 188b9f49d4 mtip32xx: Make SGL container per-command to eliminate high order dma allocation ... The mtip32xx driver makes a high order dma memory allocation to store a command index table, some dedicated buffers, and a command header & SGL blob. This allocation can fail with a surprise insert under low & fragmented memory conditions. This patch breaks these regions up into separate low order allocations and increases the maximum number of segments a single command SGL can have. We wanted to allow at least 256 segments for 1 MB direct IO. Since the command header occupies the first 0x80 bytes of the SGL blob, that meant we needed two 4k pages to contain the header and SGL. The two pages allow up to 504 SGL segments. Signed-off-by: Sam Bradshaw <sbradshaw@micron.com> Signed-off-by: Asai Thambi S P <asamymuthupa@micron.com> Signed-off-by: Jens Axboe <axboe@kernel.dk>		2014-01-21 20:20:13 -08:00
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Kconfig	Remove GENERIC_HARDIRQ config option	2013-09-13 15:09:52 +02:00
Makefile
mtip32xx.c	mtip32xx: Make SGL container per-command to eliminate high order dma allocation	2014-01-21 20:20:13 -08:00
mtip32xx.h	mtip32xx: Make SGL container per-command to eliminate high order dma allocation	2014-01-21 20:20:13 -08:00