diff options
| author | Andrew Morton <akpm@digeo.com> | 2002-12-29 21:40:44 -0800 |
|---|---|---|
| committer | Linus Torvalds <torvalds@home.transmeta.com> | 2002-12-29 21:40:44 -0800 |
| commit | d83f033a39a4bbe52b6c1ffd14bd994e70f9b6fe (patch) | |
| tree | cac4bf607c9268acfe1d4b866103d9c339803aa2 /include/linux | |
| parent | 29621f41b70cb609f46db52e2a92faca9e6186ea (diff) | |
[PATCH] Don't cacheline-align vm_area_struct
Some workloads (Oracle...) use a huge number of VMA's. They are
currently a tidy 64 bytes in size, and padding them out to 128 on P4's
is not worthwhile.
Diffstat (limited to 'include/linux')
| -rw-r--r-- | include/linux/mm.h | 3 |
1 files changed, 3 insertions, 0 deletions
diff --git a/include/linux/mm.h b/include/linux/mm.h index df49cb472866..70177c796b12 100644 --- a/include/linux/mm.h +++ b/include/linux/mm.h @@ -41,6 +41,9 @@ extern int page_cluster; * per VM-area/task. A VM area is any part of the process virtual memory * space that has a special rule for the page-fault handlers (ie a shared * library, the executable area etc). + * + * This structure is exactly 64 bytes on ia32. Please think very, very hard + * before adding anything to it. */ struct vm_area_struct { struct mm_struct * vm_mm; /* The address space we belong to. */ |