Searched hist:"6 c6ec2b0" (Results 1 – 2 of 2) sorted by relevance
/openbmc/linux/include/linux/ |
H A D | namei.h | 6c6ec2b0 Thu Dec 17 10:19:09 CST 2020 Jens Axboe <axboe@kernel.dk> fs: add support for LOOKUP_CACHED
io_uring always punts opens to async context, since there's no control over whether the lookup blocks or not. Add LOOKUP_CACHED to support just doing the fast RCU based lookups, which we know will not block. If we can do a cached path resolution of the filename, then we don't have to always punt lookups for a worker.
During path resolution, we always do LOOKUP_RCU first. If that fails and we terminate LOOKUP_RCU, then fail a LOOKUP_CACHED attempt as well.
Cc: Al Viro <viro@zeniv.linux.org.uk> Signed-off-by: Jens Axboe <axboe@kernel.dk> Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
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/openbmc/linux/fs/ |
H A D | namei.c | 6c6ec2b0 Thu Dec 17 10:19:09 CST 2020 Jens Axboe <axboe@kernel.dk> fs: add support for LOOKUP_CACHED
io_uring always punts opens to async context, since there's no control over whether the lookup blocks or not. Add LOOKUP_CACHED to support just doing the fast RCU based lookups, which we know will not block. If we can do a cached path resolution of the filename, then we don't have to always punt lookups for a worker.
During path resolution, we always do LOOKUP_RCU first. If that fails and we terminate LOOKUP_RCU, then fail a LOOKUP_CACHED attempt as well.
Cc: Al Viro <viro@zeniv.linux.org.uk> Signed-off-by: Jens Axboe <axboe@kernel.dk> Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
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