Messages in this thread | | | Date | Sat, 18 Dec 2004 09:02:47 -0200 | From | Marcelo Tosatti <> | Subject | Re: Reducing inode cache usage on 2.4? |
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James,
Can apply Andrew's patch and examine the results?
I've merged it to mainline because it looks sensible.
Thanks Andrew!
On Fri, Dec 17, 2004 at 05:21:04PM -0800, Andrew Morton wrote: > James Pearson <james-p@moving-picture.com> wrote: > > > > It seems the inode cache has priority over cached file data. > > It does. If the machine is full of unmapped clean pagecache pages the > kernel won't even try to reclaim inodes. This should help a bit: > > --- 24/mm/vmscan.c~a 2004-12-17 17:18:31.660254712 -0800 > +++ 24-akpm/mm/vmscan.c 2004-12-17 17:18:41.821709936 -0800 > @@ -659,13 +659,13 @@ int fastcall try_to_free_pages_zone(zone > > do { > nr_pages = shrink_caches(classzone, gfp_mask, nr_pages, &failed_swapout); > - if (nr_pages <= 0) > - return 1; > shrink_dcache_memory(vm_vfs_scan_ratio, gfp_mask); > shrink_icache_memory(vm_vfs_scan_ratio, gfp_mask); > #ifdef CONFIG_QUOTA > shrink_dqcache_memory(vm_vfs_scan_ratio, gfp_mask); > #endif > + if (nr_pages <= 0) > + return 1; > if (!failed_swapout) > failed_swapout = !swap_out(classzone); > } while (--tries); > _ > > > > What triggers the 'normal ageing round'? Is it possible to trigger this > > earlier (at a lower memory usage), or give a higher priority to cached data? > > You could also try lowering /proc/sys/vm/vm_mapped_ratio. That will cause > inodes to be reaped more easily, but will also cause more swapout. - 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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