On Wednesday 28 November 2001 03:48, Andrew Morton wrote:
> Mike Fedyk wrote:
> > > echo file_readahead:N > /proc/ide/ide0/hda/settings
> > >
> > > where N is in kilobytes in 2.4.16 kernels.
> >
> > Any idea which drivers it will/won't work on? ie, "almost all ide" or
> > "almost none of the ide driers"?
>
> It appears that all IDE is controlled with /proc/ide/ide0/hda/settings
>
> > >In earlier kernels
> > > it's kilopages (!).
> >
> > Isn't this part of the max-readahead patch?
>
> No, that fix went in separately. Roger Larsson created it, then
> I hit the same problem and forwarded Roger's patch to the relevant
> parties.
>
The reason I did not send it directly, but sent it to Andre for proper
fix, is that the error is all over the place, this is from ide-cd.c
static void ide_cdrom_add_settings(ide_drive_t *drive)
{
int major = HWIF(drive)->major;
int minor = drive->select.b.unit << PARTN_BITS;
ide_add_setting(drive, "breada_readahead", SETTING_RW, BLKRAGET, BLKRASET,
TYPE_INT, 0, 255, 1, 2, &read_ahead[major], NULL);
ide_add_setting(drive, "file_readahead", SETTING_RW, BLKFRAGET, BLKFRASET,
TYPE_INTA, 0, INT_MAX, 1, 1024, &max_readahead[major][minor], NULL);
ide_add_setting(drive, "max_kb_per_request", SETTING_RW, BLKSECTGET,
BLKSECTSET, TYPE_INTA, 1, 255, 1, 2, &max_sectors[major][minor], NULL);
ide_add_setting(drive, "dsc_overlap", SETTING_RW, -1, -1, TYPE_BYTE, 0, 1,
1, 1, &drive->dsc_overlap, NULL);
}
/RogerL
-- Roger Larsson Skellefteå Sweden - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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