kern/163076: It is not possible to read in chunks from linprocfs and procfs.

[Petr Salinger]

The following reply was made to PR kern/163076; it has been noted by GNATS.

From: Petr Salinger <Petr.Salinger at seznam.cz>
To: =?ISO-8859-15?Q?Dag-Erling_Sm=F8rgrav?= <des at des.no>
Cc: Poul-Henning Kamp <phk at phk.freebsd.dk>, Jaakko Heinonen <jh at FreeBSD.org>,
        bug-followup at FreeBSD.org, mdf at FreeBSD.org
Subject: Re: kern/163076: It is not possible to read in chunks from linprocfs
 and procfs.
Date: Tue, 13 Dec 2011 09:13:17 +0100 (CET)

 >>> One problem is the different malloc() semantics. The kernel version uses
 >>> M_WAITOK allocations while user space malloc(3) can fail.
 >> Yes, that's Dag-Erlings and my point:  The semantics are too different.
 >
 > There is another, more important issue.
 
 And yet another point of view.
 
 Will be this regression corrected for 9.0 release ?
 
 Previously (in stable-8), the sbuf_finish() cleared the overflow error.
 It used to return void, and as noted previously,
 only 21 of 133 calls check return value of sbuf_finish(),
 i.e. only 1/6 have been migrated to new API semantics.
 
 What about restore clearing of error during sbuf_finish() for stable-9
 and do the right thing in HEAD ?
 
 Petr