https://github.com/torvalds/linux
Revision 8f71465c19ffefbfd0da3c1f5dc172b4bce05e93 authored by Jeff Layton on 01 May 2012, 21:41:49 UTC, committed by Steve French on 02 May 2012, 03:27:54 UTC
While testing, I've found that even when we are able to negotiate a much larger rsize with the server, on-the-wire reads often end up being capped at 128k because of ra_pages being capped at that level. Lifting this restriction gave almost a twofold increase in sequential read performance on my craptactular KVM test rig with a 1M rsize. I think this is safe since the actual ra_pages that the VM requests is run through max_sane_readahead() prior to submitting the I/O. Under memory pressure we should end up with large readahead requests being suppressed anyway. Signed-off-by: Jeff Layton <jlayton@redhat.com> Signed-off-by: Steve French <sfrench@us.ibm.com>
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Tip revision: 8f71465c19ffefbfd0da3c1f5dc172b4bce05e93 authored by Jeff Layton on 01 May 2012, 21:41:49 UTC
cifs: don't cap ra_pages at the same level as default_backing_dev_info
cifs: don't cap ra_pages at the same level as default_backing_dev_info
Tip revision: 8f71465
| File | Mode | Size |
|---|---|---|
| Documentation | ||
| arch | ||
| block | ||
| crypto | ||
| drivers | ||
| firmware | ||
| fs | ||
| include | ||
| init | ||
| ipc | ||
| kernel | ||
| lib | ||
| mm | ||
| net | ||
| samples | ||
| scripts | ||
| security | ||
| sound | ||
| tools | ||
| usr | ||
| virt | ||
| .gitignore | -rw-r--r-- | 1014 bytes |
| .mailmap | -rw-r--r-- | 4.2 KB |
| COPYING | -rw-r--r-- | 18.3 KB |
| CREDITS | -rw-r--r-- | 92.8 KB |
| Kbuild | -rw-r--r-- | 2.5 KB |
| Kconfig | -rw-r--r-- | 252 bytes |
| MAINTAINERS | -rw-r--r-- | 205.4 KB |
| Makefile | -rw-r--r-- | 52.2 KB |
| README | -rw-r--r-- | 17.0 KB |
| REPORTING-BUGS | -rw-r--r-- | 3.3 KB |
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