The patch titled Subject: tmpfs: implement NUMA node interleaving has been added to the -mm tree. Its filename is tmpfs-implement-numa-node-interleaving.patch Before you just go and hit "reply", please: a) Consider who else should be cc'ed b) Prefer to cc a suitable mailing list as well c) Ideally: find the original patch on the mailing list and do a reply-to-all to that, adding suitable additional cc's *** Remember to use Documentation/SubmitChecklist when testing your code *** The -mm tree is included into linux-next and is updated there every 3-4 working days ------------------------------------------------------ From: Nathan Zimmer <nzimmer@xxxxxxx> Subject: tmpfs: implement NUMA node interleaving When tmpfs has the memory policy interleaved it always starts allocating at each file at node 0. When there are many small files the lower nodes fill up disproportionately. This patch attempts to spread out node usage by starting files at nodes other then 0. I disturbed the addr parameter since alloc_pages_vma will only use it when the policy is MPOL_INTERLEAVE. Random was picked over using another variable which would require some sort of contention management. Signed-off-by: Nathan T Zimmer <nzimmer@xxxxxxx> Cc: Christoph Lameter <cl@xxxxxxxxx> Cc: Nick Piggin <npiggin@xxxxxxxxx> Cc: Hugh Dickins <hughd@xxxxxxxxxx> Cc: Lee Schermerhorn <lee.schermerhorn@xxxxxx> Acked-by: Rik van Riel <riel@xxxxxxxxxx> Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx> --- include/linux/shmem_fs.h | 1 + mm/shmem.c | 3 ++- 2 files changed, 3 insertions(+), 1 deletion(-) diff -puN include/linux/shmem_fs.h~tmpfs-implement-numa-node-interleaving include/linux/shmem_fs.h --- a/include/linux/shmem_fs.h~tmpfs-implement-numa-node-interleaving +++ a/include/linux/shmem_fs.h @@ -17,6 +17,7 @@ struct shmem_inode_info { char *symlink; /* unswappable short symlink */ }; struct shared_policy policy; /* NUMA memory alloc policy */ + unsigned long node_offset; /* bias for interleaved nodes */ struct list_head swaplist; /* chain of maybes on swap */ struct list_head xattr_list; /* list of shmem_xattr */ struct inode vfs_inode; diff -puN mm/shmem.c~tmpfs-implement-numa-node-interleaving mm/shmem.c --- a/mm/shmem.c~tmpfs-implement-numa-node-interleaving +++ a/mm/shmem.c @@ -929,7 +929,7 @@ static struct page *shmem_alloc_page(gfp /* * alloc_page_vma() will drop the shared policy reference */ - return alloc_page_vma(gfp, &pvma, 0); + return alloc_page_vma(gfp, &pvma, info->node_offset << PAGE_SHIFT ); } #else /* !CONFIG_NUMA */ #ifdef CONFIG_TMPFS @@ -1357,6 +1357,7 @@ static struct inode *shmem_get_inode(str inode->i_fop = &shmem_file_operations; mpol_shared_policy_init(&info->policy, shmem_get_sbmpol(sbinfo)); + info->node_offset = node_random(&node_online_map); break; case S_IFDIR: inc_nlink(inode); _ Subject: Subject: tmpfs: implement NUMA node interleaving Patches currently in -mm which might be from nzimmer@xxxxxxx are tmpfs-implement-numa-node-interleaving.patch -- To unsubscribe from this list: send the line "unsubscribe mm-commits" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html