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| author | Neil Brown <neilb@suse.de> | 2006-01-06 00:19:59 -0800 |
|---|---|---|
| committer | Linus Torvalds <torvalds@g5.osdl.org> | 2006-01-06 08:33:59 -0800 |
| commit | 9f708e40fe040e79f6c393a282f0701c9f8dc174 (patch) | |
| tree | e769b7b9088f03caf324923485ee1e5ef05e2292 /Documentation/pnp.txt | |
| parent | a334de28665b14f0a33df82699fa9a78cfeedf31 (diff) | |
| download | op-kernel-dev-9f708e40fe040e79f6c393a282f0701c9f8dc174.zip op-kernel-dev-9f708e40fe040e79f6c393a282f0701c9f8dc174.tar.gz | |
[PATCH] knfsd: reduce stack consumption
A typical nfsd call trace is
nfsd -> svc_process -> nfsd_dispatch -> nfsd3_proc_write ->
nfsd_write ->nfsd_vfs_write -> vfs_writev
These add up to over 300 bytes on the stack.
Looking at each of these, I see that nfsd_write (which includes
nfsd_vfs_write) contributes 0x8c to stack usage itself!!
It turns out this is because it puts a 'struct iattr' on the stack so
it can kill suid if needed. The following patch saves about 50 bytes
off the stack in this call path.
Signed-off-by: Neil Brown <neilb@suse.de>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
Diffstat (limited to 'Documentation/pnp.txt')
0 files changed, 0 insertions, 0 deletions
