92d8dadcf8
Add BIO_DELETE support to ada(4): - For SSDs use TRIM feature of DATA SET MANAGEMENT command, as defined by ACS-2 specification working draft. - For CompactFlash use CFA ERASE command, same as ad(4) does. With this patch, `newfs -E /dev/ada1` was able to restore write speed of my heavily weared OCZ Vertex SSD (firmware 1.4) up to the initial level for the most part of it's capacity. I have no idea whether it is normal, but for some reason it takes 200ms to handle any TRIM command on this drive, that was making delete extremely slow. But TRIM command is able to accept long list of LBAs and the length of that list seems doesn't affect it's execution time. Implemented request clusting algorithm allowed me to rise delete rate up to reasonable numbers, when many parallel DELETE requests running. |
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| .. | ||
| ata_all.c | ||
| ata_all.h | ||
| ata_da.c | ||
| ata_pmp.c | ||
| ata_xpt.c | ||