SUNRPC: Use poll() to fix up the socket requeue races

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Because we clear XPRT_SOCK_DATA_READY before reading, we can end up
with a situation where new data arrives, causing xs_data_ready() to
queue up a second receive worker job for the same socket, which then
immediately gets stuck waiting on the transport receive mutex.
The fix is to only clear XPRT_SOCK_DATA_READY once we're done reading,
and then to use poll() to check if we might need to queue up a new
job in order to deal with any new data.

Signed-off-by: Trond Myklebust <trond.myklebust@hammerspace.com>

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Trond Myklebust 2019-01-30 14:51:26 -05:00

parent a1231fda7e

commit 0ffe86f480

1 changed files with 24 additions and 2 deletions

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net/sunrpc/xprtsock.c

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