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Re: Torn page hazard in ginRedoUpdateMetapage()
On Wed, May 2, 2012 at 6:06 PM, Noah Misch <noah(at)leadboat(dot)com> wrote: > Can we indeed assume that all support-worthy filesystems align the start of > every file to a physical sector? I know little about modern filesystem > design, but these references leave me wary of that assumption: > > http://www.mail-archive.com/linux-btrfs(at)vger(dot)kernel(dot)org/msg14690.html > http://en.wikipedia.org/wiki/Block_suballocation > > If it is a safe assumption, we could exploit it elsewhere. Not to say whether this is safe or not, but it *is* exploited elsewhere, as I understand it: the pg_control information, whose justification for its safety is its small size. That may point to a very rare problem with pg_control rather the safety of the assumption it makes. -- fdr
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- Re: Torn page hazard in ginRedoUpdateMetapage() at 2012-05-03 01:06:48 from Noah Misch
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- Re: Torn page hazard in ginRedoUpdateMetapage() at 2012-05-03 04:16:34 from Tom Lane
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