Commit94884e1

committed

Make slab allocator work on platforms with MAXIMUM_ALIGNOF < sizeof(int).

Notably, m68k only needs 2-byte alignment. Per report from Christoph Berg.Discussion:https://www.postgresql.org/message-id/20170517193957.fwntkgi6epuso5l2@msg.df7cb.de

1 parent3ec76ff commit94884e1Copy full SHA for 94884e1

File tree

-3

lines changed

-3

lines changed

Lines changed: 3 additions & 3 deletions

Original file line number	Diff line number	Diff line change
`@@ -194,9 +194,9 @@ SlabContextCreate(MemoryContext parent,`
`194`	`194`	`MAXALIGN(sizeof(SlabChunk)),`
`195`	`195`	`"padding calculation in SlabChunk is wrong");`
`196`	`196`
`197`		`-/otherwisethe linked listinside freed chunk isn't guaranteed to fit /`
`198`		`-StaticAssertStmt(MAXIMUM_ALIGNOF >=sizeof(int),`
`199`		`-"MAXALIGN too small to fit int32");`
	`197`	`+/Make surethe linked listnode fits inside a freed chunk /`
	`198`	`+if (chunkSize<sizeof(int))`
	`199`	`+chunkSize=sizeof(int);`
`200`	`200`
`201`	`201`	`/* chunk, including SLAB header (both addresses nicely aligned) */`
`202`	`202`	`fullChunkSize=MAXALIGN(sizeof(SlabChunk)+MAXALIGN(chunkSize));`

Comments

(0)