Revision 23918b03060f6e572168fdde1798a905679d2e06 authored by Trond Myklebust on 20 November 2008, 21:06:21 UTC, committed by Linus Torvalds on 20 November 2008, 21:17:40 UTC
Fix a regression reported by Max Kellermann whereby kernel profiling showed that his clients were spending 45% of their time in rpcauth_lookup_credcache. It turns out that although his processes had identical uid/gid/groups, generic_match() was failing to detect this, because the task->group_info pointers were not shared. This again lead to the creation of a huge number of identical credentials at the RPC layer. The regression is fixed by comparing the contents of task->group_info if the actual pointers are not identical. Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
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| File | Mode | Size |
|---|---|---|
| Kconfig | -rw-r--r-- | 2.9 KB |
| Kconfig.iosched | -rw-r--r-- | 1.9 KB |
| Makefile | -rw-r--r-- | 627 bytes |
| as-iosched.c | -rw-r--r-- | 38.7 KB |
| blk-barrier.c | -rw-r--r-- | 9.0 KB |
| blk-core.c | -rw-r--r-- | 57.2 KB |
| blk-exec.c | -rw-r--r-- | 2.7 KB |
| blk-integrity.c | -rw-r--r-- | 9.8 KB |
| blk-ioc.c | -rw-r--r-- | 4.0 KB |
| blk-map.c | -rw-r--r-- | 8.0 KB |
| blk-merge.c | -rw-r--r-- | 9.9 KB |
| blk-settings.c | -rw-r--r-- | 14.5 KB |
| blk-softirq.c | -rw-r--r-- | 4.1 KB |
| blk-sysfs.c | -rw-r--r-- | 9.2 KB |
| blk-tag.c | -rw-r--r-- | 9.8 KB |
| blk-timeout.c | -rw-r--r-- | 5.3 KB |
| blk.h | -rw-r--r-- | 3.1 KB |
| blktrace.c | -rw-r--r-- | 12.3 KB |
| bsg.c | -rw-r--r-- | 23.1 KB |
| cfq-iosched.c | -rw-r--r-- | 57.2 KB |
| cmd-filter.c | -rw-r--r-- | 5.4 KB |
| compat_ioctl.c | -rw-r--r-- | 20.9 KB |
| deadline-iosched.c | -rw-r--r-- | 11.4 KB |
| elevator.c | -rw-r--r-- | 26.8 KB |
| genhd.c | -rw-r--r-- | 27.2 KB |
| ioctl.c | -rw-r--r-- | 8.7 KB |
| noop-iosched.c | -rw-r--r-- | 2.6 KB |
| scsi_ioctl.c | -rw-r--r-- | 17.1 KB |
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