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authorEric Dumazet <edumazet@google.com>2015-12-03 20:12:07 +0100
committerAl Viro <viro@zeniv.linux.org.uk>2016-01-09 08:56:10 +0100
commit3cc4a84e026e8d61b7ffe4a7367ed09a555f2c5b (patch)
treed538f2cde041d28d7ca3320d0e88d592cb76abad /fs/9p/cache.c
parentlogfs: constify logfs_block_ops structures (diff)
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proc: add a reschedule point in proc_readfd_common()
User can pass an arbitrary large buffer to getdents(). It is typically a 32KB buffer used by libc scandir() implementation. When scanning /proc/{pid}/fd, we can hold cpu way too long, so add a cond_resched() to be kind with other tasks. We've seen latencies of more than 50ms on real workloads. Signed-off-by: Eric Dumazet <edumazet@google.com> Cc: Alexander Viro <viro@zeniv.linux.org.uk> Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
Diffstat (limited to 'fs/9p/cache.c')
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