Messages in this thread Patch in this message | | | Date | Mon, 27 Aug 2007 19:21:54 +0800 | From | Fengguang Wu <> | Subject | [PATCH 2/3] writeback: introduce dirty_volatile_interval |
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Introduce dirty_volatile_interval for the minimal dirty time. Inodes dirtied less than dirty_volatile_interval will not be considered for syncing by kupdate-style writeback.
This new parameter will be used in clustered writeback. The old dirty_expire_interval is still(but less) respected.
Cc: Chris Mason <chris.mason@oracle.com> Cc: Jens Axboe <jens.axboe@oracle.com> Cc: David Chinner <dgc@sgi.com> Cc: Ken Chen <kenchen@google.com> Cc: Michael Rubin <mrubin@google.com> Cc: Andrew Morton <akpm@osdl.org> Signed-off-by: Fengguang Wu <wfg@mail.ustc.edu.cn> --- include/linux/writeback.h | 1 + kernel/sysctl.c | 7 +++++++ mm/page-writeback.c | 5 +++++ 3 files changed, 13 insertions(+)
--- linux-2.6.23-rc3-mm1.orig/include/linux/writeback.h +++ linux-2.6.23-rc3-mm1/include/linux/writeback.h @@ -101,6 +101,7 @@ extern int dirty_background_ratio; extern int vm_dirty_ratio; extern int dirty_writeback_interval; extern int dirty_expire_interval; +extern int dirty_volatile_interval; extern int block_dump; extern int laptop_mode; --- linux-2.6.23-rc3-mm1.orig/mm/page-writeback.c +++ linux-2.6.23-rc3-mm1/mm/page-writeback.c @@ -85,6 +85,11 @@ int dirty_writeback_interval = 5 * HZ; int dirty_expire_interval = 30 * HZ; /* + * The shortest number of jiffies for which data should remain dirty + */ +int dirty_volatile_interval = 5 * HZ; + +/* * Flag that makes the machine dump writes/reads and block dirtyings. */ int block_dump; --- linux-2.6.23-rc3-mm1.orig/kernel/sysctl.c +++ linux-2.6.23-rc3-mm1/kernel/sysctl.c @@ -837,6 +837,13 @@ static struct ctl_table vm_table[] = { .proc_handler = &proc_dointvec_userhz_jiffies, }, { + .procname = "dirty_volatile_centisecs", + .data = &dirty_volatile_interval, + .maxlen = sizeof(dirty_volatile_interval), + .mode = 0644, + .proc_handler = &proc_dointvec_userhz_jiffies, + }, + { .ctl_name = VM_NR_PDFLUSH_THREADS, .procname = "nr_pdflush_threads", .data = &nr_pdflush_threads, -- - 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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