Date: Wed, 09 Aug 1995 19:09:58 -0700 From: David Greenman <davidg@Root.COM> To: esser@ZPR.Uni-Koeln.DE (Stefan Esser) Cc: CVS-commiters@freefall.freebsd.org, cvs-sys@freefall.freebsd.org Subject: Re: cvs commit: src/sys/ufs/ffs ffs_inode.c Message-ID: <199508100210.TAA00461@corbin.Root.COM> In-Reply-To: Your message of "Wed, 09 Aug 95 14:10:47 %2B0200." <199508091210.AA09425@Sysiphos>
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>On Aug 3, 22:49, David Greenman wrote: >} Subject: cvs commit: src/sys/ufs/ffs ffs_inode.c >} davidg 95/08/03 22:49:18 >} >} Modified: sys/ufs/ffs ffs_inode.c >} Log: >} Use the correct flags (IO_SYNC -> B_SYNC) when deciding to do a sync or >} async write in the section that changes the filesize. The bug resulted >} in the updates always being async. > >What performance improvement is >to expect from that patch ? None at all. It isn't a performance change; it's a bugfix. The bug could have resulted in certain types of FS corruption if the system crashed at just the wrong time. >I found that the "-async" option >made no difference at all ! That's because it isn't implemented in the FreeBSD kernel. We will have support for it when we integrate the 4.4BSD-Lite/2 changes. -DG
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