On Sun, 4 Mar 2012 09:40:07 +1100 ronnie sahlberg <ronniesahlberg@xxxxxxxxx> wrote: > From 38feafe65af95df0e0497df51df18d7ab81e2997 Mon Sep 17 00:00:00 2001 > From: Ronnie Sahlberg <ronniesahlberg@xxxxxxxxx> > Date: Sun, 4 Mar 2012 09:33:48 +1100 > Subject: [PATCH] DPO: Add emulation of DPO bit for READ/WRITE/VERIFY10/12/16 > > When the DPO bit is set to 1, this is an indication the initiator will not > reference the data again. > For this case, call posix_fadvise() and let the kernel know it may > expunge this data from the page cache. > > From SBC READ10 : > > NOTE 11 - The DPO bit is used to control replacement of logical blocks in the cache when the application > client has information on the future usage of the logical blocks. If the DPO bit is set to one, the application > client is specifying that the logical blocks accessed by the command are not likely to be accessed again in the > near future and should not be put in the cache nor retained by the cache. If the DPO bit is set to zero, the > application client is specifying that the logical blocks accessed by this command are likely to be accessed > again in the near future. > > Signed-off-by: Ronnie Sahlberg <ronniesahlberg@xxxxxxxxx> > --- > usr/bs_rdwr.c | 13 +++++++++++++ > 1 files changed, 13 insertions(+), 0 deletions(-) Looks fine. Applied, thanks. -- To unsubscribe from this list: send the line "unsubscribe stgt" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
