* o_direct-11 and blkdev-pagecache-8
@ 2001-08-02 13:05 Andrea Arcangeli
2001-08-05 16:28 ` blkdev-pagecache-11 Andrea Arcangeli
0 siblings, 1 reply; 3+ messages in thread
From: Andrea Arcangeli @ 2001-08-02 13:05 UTC (permalink / raw)
To: linux-kernel; +Cc: jeremy
Here the latest release against 2.4.8pre3.
For the blkdev-pagecache I decreased performance going to 1k I/O
granularity to provide total backwards compatibility, otherwise it was
not possible to read the last bytes of the device if the size of the
device was not a multiple of 4k and there's no way to work around that
without intensive changes :(, this in turn means the doing O_DIRECT on
the blkdevice now has a constraint of 1k I/O granularity on the
read/write API (not anymore the more restrictive 4k granularity).
The O_DIRECT patch includes a one liner I got from the GFS folks to
update the i_size of the inode correctly.
They must be applyed in order:
ftp://ftp.us.kernel.org/pub/linux/kernel/people/andrea/patches/v2.4/2.4.8pre3/o_direct-11
ftp://ftp.us.kernel.org/pub/linux/kernel/people/andrea/patches/v2.4/2.4.8pre3/blkdev-pagecache-8
Now it would be nice to have a patch incremental to those so that rawio
also uses the preallocated per-file iobuf (note: the preallocation
should happen in the rawio layer, not in the vfs like we just do with
the generic O_DIRECT).
Andrea
^ permalink raw reply [flat|nested] 3+ messages in thread
* blkdev-pagecache-11
2001-08-02 13:05 o_direct-11 and blkdev-pagecache-8 Andrea Arcangeli
@ 2001-08-05 16:28 ` Andrea Arcangeli
2001-08-05 16:29 ` blkdev-pagecache-11 Andrea Arcangeli
0 siblings, 1 reply; 3+ messages in thread
From: Andrea Arcangeli @ 2001-08-05 16:28 UTC (permalink / raw)
To: linux-kernel; +Cc: jeremy
This new update 1) runs get_super after fsync_dev in invalidate_device
to avoid sleeping before the lock_super in case do_sync == 1, 2)
replaces the softblocksize bugcheck in ll_rw_block with an hardblocksize
bugcheck, now the softblocksize is a purerly filesystem thing, completly
unrelated to the other ways of doing I/O (this fixes false positives of
such bugcheck after a mount of a 4k fs).
ftp://ftp.us.kernel.org/pub/linux/kernel/people/andrea/patches/v2.4/2.4.8pre4/blkdev-pagecache-10
as usual you must apply the o_direct patch first (the o_direct patch
has no updates and it stays at the -11 revision):
ftp://ftp.us.kernel.org/pub/linux/kernel/people/andrea/patches/v2.4/2.4.8pre4/o_direct-11
Andrea
^ permalink raw reply [flat|nested] 3+ messages in thread
* Re: blkdev-pagecache-11
2001-08-05 16:28 ` blkdev-pagecache-11 Andrea Arcangeli
@ 2001-08-05 16:29 ` Andrea Arcangeli
0 siblings, 0 replies; 3+ messages in thread
From: Andrea Arcangeli @ 2001-08-05 16:29 UTC (permalink / raw)
To: linux-kernel
of course the subject was supposed to be "blkdev-pagecache-10" :), sorry
Andrea
^ permalink raw reply [flat|nested] 3+ messages in thread
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