| To: | Andi Kleen <andi@xxxxxxxxxxxxxx> |
|---|---|
| Subject: | Re: Device loses barrier support |
| From: | Timothy Shimmin <tes@xxxxxxx> |
| Date: | Fri, 05 Dec 2008 16:44:14 +1100 |
| Cc: | Mikulas Patocka <mpatocka@xxxxxxxxxx>, Andi Kleen <andi-suse@xxxxxxxxxxxxxx>, linux-kernel@xxxxxxxxxxxxxxx, xfs@xxxxxxxxxxx, Alasdair G Kergon <agk@xxxxxxxxxx>, Milan Broz <mbroz@xxxxxxxxxx> |
| In-reply-to: | <20081204145810.GR6703@xxxxxxxxxxxxxxxxxx> |
| References: | <Pine.LNX.4.64.0812040009340.15169@xxxxxxxxxxxxxxxxxxxxxxxxxxx> <20081204100050.GN6703@xxxxxxxxxxxxxxxxxx> <Pine.LNX.4.64.0812040836480.6118@xxxxxxxxxxxxxxxxxxxxxxxxxxx> <20081204142015.GQ6703@xxxxxxxxxxxxxxxxxx> <Pine.LNX.4.64.0812040913510.6118@xxxxxxxxxxxxxxxxxxxxxxxxxxx> <20081204145810.GR6703@xxxxxxxxxxxxxxxxxx> |
| User-agent: | Thunderbird 2.0.0.17 (Macintosh/20080914) |
Andi Kleen wrote: > The write block with barrier bit varies, jbd/gfs2 do it synchronously > too and xfs does it asynchronously (with io done callbacks), but > in both cases they handle an EOPNOTSUPP comming out in the final > io done. > Yes, XFS handles it, however, it doesn't look like we currently propagate the EOPNOTSUPP up to where we test it (not set for b_error). Patch disscussed recently on xfs list to rectify this. --Tim |
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