Messages in this thread Patch in this message | | | Date | Fri, 23 Feb 2007 21:03:52 +0900 | From | Tomoki Sekiyama <> | Subject | [RFC][PATCH 1/3] VM throttling: Add vm.dirty_limit_ratio to sysctl |
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This patch adds sysctl variable vm.dirty_limit_ratio.
Signed-off-by: Tomoki Sekiyama <tomoki.sekiyama.qu@hitachi.com> Signed-off-by: Yuji Kakutani <yuji.kakutani.uw@hitachi.com> --- include/linux/sysctl.h | 1 + include/linux/writeback.h | 1 + kernel/sysctl.c | 11 +++++++++++ mm/page-writeback.c | 5 +++++ 4 files changed, 18 insertions(+)
Index: linux-2.6.20-mm2-bdp/include/linux/sysctl.h =================================================================== --- linux-2.6.20-mm2-bdp.orig/include/linux/sysctl.h +++ linux-2.6.20-mm2-bdp/include/linux/sysctl.h @@ -207,6 +207,7 @@ enum VM_PANIC_ON_OOM=33, /* panic at out-of-memory */ VM_VDSO_ENABLED=34, /* map VDSO into new processes? */ VM_MIN_SLAB=35, /* Percent pages ignored by zone reclaim */ + VM_DIRTY_LIMIT_RATIO=36,/* dirty_limit_ratio */
/* s390 vm cmm sysctls */ VM_CMM_PAGES=1111, Index: linux-2.6.20-mm2-bdp/include/linux/writeback.h =================================================================== --- linux-2.6.20-mm2-bdp.orig/include/linux/writeback.h +++ linux-2.6.20-mm2-bdp/include/linux/writeback.h @@ -95,6 +95,7 @@ static inline int laptop_spinned_down(vo /* These are exported to sysctl. */ extern int dirty_background_ratio; extern int vm_dirty_ratio; +extern int dirty_limit_ratio; extern int dirty_writeback_interval; extern int dirty_expire_interval; extern int block_dump; Index: linux-2.6.20-mm2-bdp/kernel/sysctl.c =================================================================== --- linux-2.6.20-mm2-bdp.orig/kernel/sysctl.c +++ linux-2.6.20-mm2-bdp/kernel/sysctl.c @@ -684,6 +684,17 @@ static ctl_table vm_table[] = { .extra2 = &one_hundred, }, { + .ctl_name = VM_DIRTY_LIMIT_RATIO, + .procname = "dirty_limit_ratio", + .data = &dirty_limit_ratio, + .maxlen = sizeof(dirty_limit_ratio), + .mode = 0644, + .proc_handler = &proc_dointvec_minmax, + .strategy = &sysctl_intvec, + .extra1 = &zero, + .extra2 = &one_hundred, + }, + { .ctl_name = VM_DIRTY_WB_CS, .procname = "dirty_writeback_centisecs", .data = &dirty_writeback_interval, Index: linux-2.6.20-mm2-bdp/mm/page-writeback.c =================================================================== --- linux-2.6.20-mm2-bdp.orig/mm/page-writeback.c +++ linux-2.6.20-mm2-bdp/mm/page-writeback.c @@ -75,6 +75,11 @@ int dirty_background_ratio = 10; int vm_dirty_ratio = 40;
/* + * The generator of dirty data is blocked at this percentage + */ +int dirty_limit_ratio = 45; + +/* * The interval between `kupdate'-style writebacks, in jiffies */ int dirty_writeback_interval = 5 * HZ; - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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