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Pull request 

I was too quick in sending the coroutine pool sizing change for -rc0 and still
 needed to address feedback from Daniel Berrangé.
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Merge tag 'block-pull-request' of https://gitlab.com/stefanha/qemu into staging

Pull request

I was too quick in sending the coroutine pool sizing change for -rc0 and still
needed to address feedback from Daniel Berrangé.

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# gpg: Signature made Thu 21 Mar 2024 17:22:45 GMT
# gpg:                using RSA key 8695A8BFD3F97CDAAC35775A9CA4ABB381AB73C8
# gpg: Good signature from "Stefan Hajnoczi <stefanha@redhat.com>" [full]
# gpg:                 aka "Stefan Hajnoczi <stefanha@gmail.com>" [full]
# Primary key fingerprint: 8695 A8BF D3F9 7CDA AC35  775A 9CA4 ABB3 81AB 73C8

* tag 'block-pull-request' of https://gitlab.com/stefanha/qemu:
  coroutine: reserve 5,000 mappings

Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
This commit is contained in:
Peter Maydell 2024-03-22 10:59:39 +00:00
parent fea445e8fe 9352f80cd9
commit 6a91e62694
1 changed files with 10 additions and 5 deletions
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15
util/qemu-coroutine.c
View File

@ -377,12 +377,17 @@ static unsigned int get_global_pool_hard_max_size(void)
NULL) &&
qemu_strtoi(contents, NULL, 10, &max_map_count) == 0) {
/*
* This is a conservative upper bound that avoids exceeding
* max_map_count. Leave half for non-coroutine users like library
* dependencies, vhost-user, etc. Each coroutine takes up 2 VMAs so
* halve the amount again.
* This is an upper bound that avoids exceeding max_map_count. Leave a
* fixed amount for non-coroutine users like library dependencies,
* vhost-user, etc. Each coroutine takes up 2 VMAs so halve the
* remaining amount.
*/
return max_map_count / 4;
if (max_map_count > 5000) {
return (max_map_count - 5000) / 2;
} else {
/* Disable the global pool but threads still have local pools */
return 0;
}
}
#endif