https://github.com/torvalds/linux
Revision 8c0863403f109a43d7000b4646da4818220d501f authored by Linus Torvalds on 16 November 2007, 00:41:52 UTC, committed by Linus Torvalds on 16 November 2007, 00:41:52 UTC
This code harks back to the days when we didn't count dirty mapped pages, which led us to try to balance the number of dirty unmapped pages by how much unmapped memory there was in the system. That makes no sense any more, since now the dirty counts include the mapped pages. Not to mention that the math doesn't work with HIGHMEM machines anyway, and causes the unmapped_ratio to potentially turn negative (which we do catch thanks to clamping it at a minimum value, but I mention that as an indication of how broken the code is). The code also was written at a time when the default dirty ratio was much larger, and the unmapped_ratio logic effectively capped that large dirty ratio a bit. Again, we've since lowered the dirty ratio rather aggressively, further lessening the point of that code. Acked-by: Peter Zijlstra <a.p.zijlstra@chello.nl> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
1 parent adea27f
Tip revision: 8c0863403f109a43d7000b4646da4818220d501f authored by Linus Torvalds on 16 November 2007, 00:41:52 UTC
dirty page balancing: Get rid of broken unmapped_ratio logic
dirty page balancing: Get rid of broken unmapped_ratio logic
Tip revision: 8c08634
| File | Mode | Size |
|---|---|---|
| lzo | ||
| reed_solomon | ||
| zlib_deflate | ||
| zlib_inflate | ||
| .gitignore | -rw-r--r-- | 51 bytes |
| Kconfig | -rw-r--r-- | 2.8 KB |
| Kconfig.debug | -rw-r--r-- | 17.9 KB |
| Makefile | -rw-r--r-- | 2.4 KB |
| argv_split.c | -rw-r--r-- | 1.8 KB |
| audit.c | -rw-r--r-- | 1.2 KB |
| bitmap.c | -rw-r--r-- | 24.1 KB |
| bitrev.c | -rw-r--r-- | 2.1 KB |
| bug.c | -rw-r--r-- | 4.1 KB |
| bust_spinlocks.c | -rw-r--r-- | 588 bytes |
| check_signature.c | -rw-r--r-- | 599 bytes |
| cmdline.c | -rw-r--r-- | 3.5 KB |
| cpumask.c | -rw-r--r-- | 565 bytes |
| crc-ccitt.c | -rw-r--r-- | 3.0 KB |
| crc-itu-t.c | -rw-r--r-- | 2.8 KB |
| crc16.c | -rw-r--r-- | 2.8 KB |
| crc32.c | -rw-r--r-- | 14.9 KB |
| crc32defs.h | -rw-r--r-- | 1.0 KB |
| crc7.c | -rw-r--r-- | 2.3 KB |
| ctype.c | -rw-r--r-- | 1.3 KB |
| debug_locks.c | -rw-r--r-- | 1.1 KB |
| dec_and_lock.c | -rw-r--r-- | 806 bytes |
| devres.c | -rw-r--r-- | 7.1 KB |
| div64.c | -rw-r--r-- | 1.6 KB |
| dump_stack.c | -rw-r--r-- | 290 bytes |
| extable.c | -rw-r--r-- | 1.9 KB |
| fault-inject.c | -rw-r--r-- | 7.8 KB |
| find_next_bit.c | -rw-r--r-- | 4.3 KB |
| gen_crc32table.c | -rw-r--r-- | 1.8 KB |
| genalloc.c | -rw-r--r-- | 5.3 KB |
| halfmd4.c | -rw-r--r-- | 2.0 KB |
| hexdump.c | -rw-r--r-- | 6.0 KB |
| hweight.c | -rw-r--r-- | 1.6 KB |
| idr.c | -rw-r--r-- | 19.4 KB |
| inflate.c | -rw-r--r-- | 37.8 KB |
| int_sqrt.c | -rw-r--r-- | 533 bytes |
| iomap.c | -rw-r--r-- | 7.5 KB |
| iomap_copy.c | -rw-r--r-- | 2.1 KB |
| ioremap.c | -rw-r--r-- | 2.1 KB |
| irq_regs.c | -rw-r--r-- | 578 bytes |
| kasprintf.c | -rw-r--r-- | 680 bytes |
| kernel_lock.c | -rw-r--r-- | 4.6 KB |
| klist.c | -rw-r--r-- | 6.8 KB |
| kobject.c | -rw-r--r-- | 14.1 KB |
| kobject_uevent.c | -rw-r--r-- | 7.3 KB |
| kref.c | -rw-r--r-- | 1.6 KB |
| libcrc32c.c | -rw-r--r-- | 6.4 KB |
| list_debug.c | -rw-r--r-- | 2.0 KB |
| locking-selftest-hardirq.h | -rw-r--r-- | 207 bytes |
| locking-selftest-mutex.h | -rw-r--r-- | 120 bytes |
| locking-selftest-rlock-hardirq.h | -rw-r--r-- | 74 bytes |
| locking-selftest-rlock-softirq.h | -rw-r--r-- | 74 bytes |
| locking-selftest-rlock.h | -rw-r--r-- | 158 bytes |
| locking-selftest-rsem.h | -rw-r--r-- | 163 bytes |
| locking-selftest-softirq.h | -rw-r--r-- | 207 bytes |
| locking-selftest-spin-hardirq.h | -rw-r--r-- | 73 bytes |
| locking-selftest-spin-softirq.h | -rw-r--r-- | 73 bytes |
| locking-selftest-spin.h | -rw-r--r-- | 118 bytes |
| locking-selftest-wlock-hardirq.h | -rw-r--r-- | 74 bytes |
| locking-selftest-wlock-softirq.h | -rw-r--r-- | 74 bytes |
| locking-selftest-wlock.h | -rw-r--r-- | 158 bytes |
| locking-selftest-wsem.h | -rw-r--r-- | 163 bytes |
| locking-selftest.c | -rw-r--r-- | 28.6 KB |
| parser.c | -rw-r--r-- | 5.9 KB |
| percpu_counter.c | -rw-r--r-- | 3.1 KB |
| plist.c | -rw-r--r-- | 2.8 KB |
| prio_heap.c | -rw-r--r-- | 1.4 KB |
| prio_tree.c | -rw-r--r-- | 12.2 KB |
| proportions.c | -rw-r--r-- | 8.8 KB |
| radix-tree.c | -rw-r--r-- | 27.2 KB |
| random32.c | -rw-r--r-- | 3.6 KB |
| rbtree.c | -rw-r--r-- | 8.6 KB |
| reciprocal_div.c | -rw-r--r-- | 159 bytes |
| rwsem-spinlock.c | -rw-r--r-- | 6.9 KB |
| rwsem.c | -rw-r--r-- | 6.4 KB |
| semaphore-sleepers.c | -rw-r--r-- | 4.7 KB |
| sha1.c | -rw-r--r-- | 2.4 KB |
| smp_processor_id.c | -rw-r--r-- | 1.1 KB |
| sort.c | -rw-r--r-- | 2.5 KB |
| spinlock_debug.c | -rw-r--r-- | 6.8 KB |
| string.c | -rw-r--r-- | 12.9 KB |
| swiotlb.c | -rw-r--r-- | 22.4 KB |
| textsearch.c | -rw-r--r-- | 9.2 KB |
| ts_bm.c | -rw-r--r-- | 4.9 KB |
| ts_fsm.c | -rw-r--r-- | 10.5 KB |
| ts_kmp.c | -rw-r--r-- | 3.8 KB |
| vsprintf.c | -rw-r--r-- | 22.0 KB |
Computing file changes ...
