Re: kern/55237

[Andrew Doran <ad%netbsd.org@localhost>]

The following reply was made to PR kern/55237; it has been noted by GNATS.

From: Andrew Doran <ad%netbsd.org@localhost>
To: gnats-bugs%netbsd.org@localhost
Cc: kern-bug-people%netbsd.org@localhost, gnats-admin%netbsd.org@localhost,
	netbsd-bugs%netbsd.org@localhost
Subject: Re: kern/55237
Date: Sat, 23 May 2020 22:26:32 +0000

 On Sat, May 23, 2020 at 09:50:02PM +0000, Yorick Hardy wrote:
 > The following reply was made to PR kern/55237; it has been noted by GNATS.
 > 
 > From: Yorick Hardy <yorickhardy%gmail.com@localhost>
 > To: gnats-bugs%netbsd.org@localhost
 > Cc: 
 > Subject: Re: kern/55237
 > Date: Sat, 23 May 2020 23:47:11 +0200
 > 
 >  A very wild guess, I was wondering if this change affects the writecount
 >  (after a superficial reading of fd_putfile):
 >  
 >   cvs rdiff -u -r1.543 -r1.544 src/sys/kern/vfs_syscalls.c
 >  
 >  mail/fdm depends on databases/tdb, which uses fdatasync (checked only by a quick grep).
 >  
 >  I am building a test kernel with the change reverted, and will try it out for
 >  a few days to see if it is stable.
 
 At a guess is not responsible, but worthwhile trying with it reverted.
 
 I made a commit but I don't think that one will cure it either.
 
 I'm suspicious of the assertion actually, there might be a race condition. 
 Will think about it some more.
 
 Andrew